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Mattress Glossary

Want to know all there is to know about mattresses? Browse through Serta’s extensive Mattress Glossary here to find definitions of the most common mattress-related terms. You can scroll through our entire glossary, or use the links below to jump ahead.

Serta Mattress Terms

  • 420 SertaFlex™ Innerspring

    This Innerspring uses an offset coil design to ensure maximum flexibility and responsiveness and has an increased surface coverage compared to other value-priced innersprings. Plus, the alternating coil design enhances stability while strengthening the mattresses edges.

  • 460 SertaFlex™ EX Innerspring

    This Innerspring uses an offset coil design to ensure maximum flexibility and responsiveness and has an increased surface coverage compared to other value-priced innersprings. Plus, the alternating coil design enhances stability while strengthening the mattresses edges.

  • 520 Continuous Support® Innerspring

    Combines our continuous coil design with our Head-to-Toe Coil Construction to promote proper back support and undisturbed sleep. Rows of continuous coils run head-to-toe, with each coil attaching to its neighbor, for the durability and stability needed to provide support while absorbing motion.

  • 744 Serta® Individually Wrapped Coil Support System with BestEdge® Foam Encasement

    Hundreds of individually wrapped coils work independently to conform to the body, responding to pressure and providing extra support where you need it most. The advanced design works to reduce motion transfer while our BestEdge® Foam Encasement extends the sleeping surface and eliminates potential edge “roll off”.

  • 800 Continuous Support® Innerspring with Total Edge® Foam Encasement

    Combines our continuous coil design with our Head-to-Toe Coil Construction to help promote proper back support and reduce motion transfer. Rows of continuous coils run head-to-toe, with each coil attaching to its neighbor, for the durability and stability needed to provide support while absorbing motion. Plus, Serta’s Total Edge® Foam Encasement strengthens the mattress edges.

  • 814 Free Flex® Innerspring with Custom Support® and Total Edge® Foam Encasement

    This patented and exclusive innerspring design helps promote proper back support and undisturbed sleep by combining the legendary support and stability of Serta’s continuous coil technology with our advanced TrueSense® coil design. Our Custom Support® design provides up to 25% more support in the center third of the innerspring. Plus, a custom designed version of our Total Edge® Foam Encasement makes the mattress compatible with an adjustable foundation and helps to prevent roll-off or sag at the edge of the mattress.

  • Active Base

    An active base allows you to adjust the support and firmness of the mattress to fit your personal needs and maximize your comfort. Active bases are also referred to as "adjustable beds". See our Trump Home™ Mattress Collection section for information on mattresses compatible with active bases.

  • Adjustable Bed

    A type of bed designed for an active base, or a special base that can be adjusted into various positions. See our Trump Home™ Mattress Collection section for information on mattresses compatible with adjustable bed bases.

  • Advanced Comfort Quit®

    This patented and exclusive quilt layer is designed to cushion every part of the body while relieving pressure points. Advanced Comfort Quilt works to reduce tossing and turning for a more comfortable and restful night’s sleep. See our Perfect Sleeper section for more information.

  • Anti-microbial foams and fibers

    Foams or fibers that have been treated to be or naturally are anti-microbial, preventing the growth of bacteria and dust mites.

  • Base Fiber

    A fiber pad underneath the mattress innerspring that provides stability to a no flip mattress.

  • Bed Frame

    A metal or wood frame used to support the mattress and the foundation. See our Mattress Care section for information on selecting the proper bed frame for your mattress.

  • Bed Rails

    The "L" shaped sides of a bed frame that hold the mattress in place.

  • BestEdge® Foam Encasement

    This exclusive design ensures an edge-to-edge sleeping surface so you have more room to stretch without any annoying edge “roll off.”

  • Body Impressions

    Term used to describe normal indentations on the mattress surface from normal compression of the mattress foams and fibers in the upholstery layer. Body impressions up to 1 1/2" are normal. See our Serta Mattress FAQ section for more information on body impressions.

  • Body Loft™ Anti-Microbial Fiber

    Serta's Anti-Microbial Body Loft® Fiber provides enhanced cushioning while wicking away moisture that can cause uncomfortable heat build up.

  • Bonnell Coil Innerspring

    A type of innerspring with hourglass-shaped coils, which are attached to surrounding coils with a small wire spiral called a helical. Also called "Open" coil. See our Types of Mattresses Section for more information.

  • Border Rod

    Wire that surrounds the Innerspring or Box Spring/Foundation which creates a stronger seating edge for additional durability.

  • Border Wire

    See border rod.

  • Box Spring

    An upholstered bedspring composed of a number of helical springs with moving parts that supports a mattress. The term "box spring" is often used interchangeably with the term "foundation", but these are two different things. Today's single sided mattresses use foundations, which are similar to box springs but have no moving parts. Foundations are designed to provide proper support to today's single-sided mattresses designed to remove the hassle of flipping a mattress.

  • Bunkie Board

    A thin foundation made for all sized mattresses. Mainly used on bunk beds to significantly lower the height of a mattress set.

  • California King

    A mattress with an approximate measurement of 72 x 83.5". See Serta's Size Chart to compare mattress sizes.

  • Clipped Border Wire

    A process used to attach the border wire to the innerspring unit. This provides a stronger connection than the more popular helical wire for a firmer, more durable seating edge.

  • Coil Count

    The number of coils in an innerspring unit. A high coil count alone does not indicate better quality. Firmness support and durability are determined by the design of the coil, the gauge of wire used and the way the coil is engineered. The count is usually based on the number of coils in a queen-size unit. See our What's in a Mattress section for more information on coil count.

  • Coils

    Spirals of steel wire that make up an innerspring unit, or the support system of an innerspring mattress. See our What's in a Mattress section for more information on coils.

  • Comfort Last® Construction with Reinforced Edge®

    This construction helps prevent roll-off or sag, regardless of body type, size or sleeping position. Every Perfect Sleeper® system design is tested beyond industry standards to meet the demands of over 99% of the adult population and uses our Reinforced Edge® system with a durable steel border rod to strengthen the mattress edges.

  • Comfort Last® Construction with Total Edge® Foam Encasement

    This construction helps prevent roll-off or sag, regardless of body type, size or sleeping position. Every Perfect Sleeper® system design is tested beyond industry standards to meet the demands of over 99% of the adult population and uses our Total Edge® Foam Encasement to strengthen the mattress edges.

  • Comfort Last® Foam Core with Ultimate Edge® Support

    This advanced foam support system is designed to help support your body throughout the night, promoting a more restful night’s sleep. Plus, Ultimate Edge® Support strengthens the mattress edges, reducing that annoying edge “roll-off” so you have more room to stretch. Available in every iComfort Sleep System.

  • Comfort Last® Supreme Construction

    Serta’s exclusive Comfortlast® Supreme Construction means that the iSeries® sleep system design has been tested beyond industry standards (using tests designed to simulate 25 years of wear life) to ensure lasting comfort and durability.

  • Comfort Layer

    The upholstery and quilt layers of a mattress, typically composed of various foams and fibers, that rests on top of the support system. The comfort layer determines the "feel" or "firmness" of a mattress. Also referred to as "upholstery layer". See our What's in a Mattress section for more information on Comfort Layer.

  • Continental Style Foundation

    Wrapping the border fabric around the top of a foundation to eliminate the tape edge. Gives the border of the foundation a stronger and cleaner look.

  • Continuous coil innerspring

    A type of innerspring with rows of advanced coils made of a single, continuous wire. See our Types of Mattresses Section for more information.

  • Continuous Comfort™ Design

    Our Continuous Comfort™ Design keeps the cradling and cooling comfort of our advanced memory foam materials closer to your body, so you can relax comfortably and get a more restful night’s sleep. Plus, the Continuous Comfort design gives your mattress a beautifully tailored and stylish finish.

  • Convoluted Foam

    Foam with "dimples" designed to provide comfort and pressure relief. The shape is similar to that of an egg carton, which is why this foam is sometimes referred to as "egg crate" foam.

  • Cool Action™ Dual Effects™ Gel Memory Foam

    This is the world’s first dual-action gel memory foam infused with both Serta’s original MicroSupport® gel and our new MicroCool+™ gel – for 25% more total gel than our original Cool Action™ gel memory foam. This unique and exclusive design works to provide more support where your body needs it and gives the material an enhanced ability to transport heat away from the mattress layers above it. Here’s how it works - Millions of Serta’s original MicroSupport® gel beads gather under the areas of your body that need extra push back support. Meanwhile, our new MicroCool+™ gel features advanced phase change material encapsulated in a proprietary gel designed to efficiently capture, store and ultimately dissipate away heat from the mattress layers above.

  • Cool Action™ Gel Energy Foam

    This extra resilient formulation of our exclusive Cool Action™ material responds quickly to body pressure for enhanced comfort and deep down support you’ll feel the moment you lie down.  Meanwhile, a superfine infusion of our Microsupport® gel helps enhance the natural cooling properties of the material and provides extra support where you need it most.

  • Cool Action™ Gel Memory Foam

    Serta’s Cool Action™ Gel Memory Foam is the world’s first memory foam infused with the support and cooling touch of Serta’s Microsupport® gel. This revolutionary gel memory foam is designed to deliver excellent pressure relief and targeted support while helping to reduce heat build-up at the sleep surface.

  • Cool Balance® Fabric Technology

    This fabric technology promotes a balanced sleeping temperature by helping to regulate the flow of heat and moisture away from the body. This allows our soft, breathable fabric to help reduce uncomfortable heat build up.

  • Cool Reaction™ Slow Recovery Latex Foam

    This naturally breathable foam responds instantly to comfort and support your body while avoiding the "springy" feeling that can be associated with other latex foams. Plus, the natural properties of latex help protect your mattress from dust mites.

  • Cool Twist™ Gel Memory Foam

    This exclusive liquid gel-enhanced memory foam is designed for significantly increased airflow which helps move heat away from your body. Plus, it gently conforms to the body to provide enhanced cushioning and help reduce the pressure points that cause tossing and turning.

  • Counting Sheep

    Serta's beloved and reluctant brand icon introduced in 2000. The counting sheep's goal is to stop people from sleeping on a Serta so they have to count sheep instead (job security). They were inducted into the Advertising Walk of Fame in 2008.

  • Cover

    See Mattress Ticking.

  • Damask Cover

    Woven fabric with a pattern that is used as a tick on mattresses.

  • Double Mattress

    See Full Mattress. See Serta's Size Chart to compare mattress sizes.

  • Double Sided Mattress (or two-sided mattress)

    Mattresses built with a sleeping surface on both sides. Allows users to flip the mattress over and sleep on both sides. These are rare in the retail marketplace but are still widely used in the hospitality industry. Double sided mattresses have been replaced by today's single-sided models which are designed to deliver the same comfort and support without the hassle of having to flip the mattress.

  • Duet® Coil Individually Wrapped Coil-in-Coil Support System with BestEdge® Foam Encasement

    This exclusive support system features strategically placed Duet® Coils that properly balance comfort and support across the entire sleep surface, allowing the system to respond to each sleep partner individually. Each Duet Coil is engineered so the exterior coil provides an initial soft and luxurious feeling, while the interior coils provide the essential support needed for correct postural alignment. Plus our Duet Coil Support System features a posturized design, with nearly two-thirds of the Duet Coils concentrated in the center third of the innerspring.

  • Egg-crate Foam

    See Convoluted Foam.

  • Euro Top Mattress

    A type of mattress with an additional upholstery layer at the sleep surface for enhanced cushioning. It has more structured tailoring than a traditional pillow top and, therefore, can be constructed to feel firmer than a pillow top. Click here to read about Serta's different comfort choices.

  • EverCool™ Gfx Memory Foam

    This is the world’s first premium, breathable memory foam featuring a super-fine infusion of heat-conducting graphene for supple, body conforming comfort and an extra ability to whisk heat away from the body. This new material has up to 25% more heat dissipation ability than Serta’s original Kool Comfort™ memory foam.

  • FireBlocker®

    Serta's advanced fire retardant system designed to keep families safe in the event of a bedroom fire. It is a proprietary blend of natural and synthetic fibers that slows the spread of open flame, providing more time to escape a bedroom fire. See our What's in a Mattress Section for more information on FireBlocker.

  • Firm Mattress

    A type of mattress with a construction that uses less foams and fibers so the sleeper sleeps closer to the support system, feeling less cushioning.

  • Firmness

    A term used to describe the "feel" of a mattress in terms of softness (or lack thereof). Serta Mattresses available in a variety of feels including firm, plush, pillow top and euro top.

  • Foam Core

    A type of support system made of entirely of supportive foam, such as Visco-elastic Memory Foam or Latex Foam. Many of Serta's Specialty products with Memory Foam cores feature a 5 lb. memory core. See our Types of Mattresses section for more information on foam cores.

  • Foam Density

    The weight of one cubic meter (foot) of foam. Foams with a higher density have better durability which is why Serta uses a 5-lb. memory foam core in its specialty products.

  • Foam Encasement

    Hard form rails along the perimeter of a mattress used to protect against edge break down. Mattresses with foam encasement experience less edge sagging and have an extended sleep surface.

  • Foams and Fibers

    Padding material made from a variety of components used to enhance the cushioning of a mattress.

  • Foundation

    Provides durability for today's single-sided mattresses. The term "foundation" is often used interchangeably with the term "box spring". However, these are two different things. What makes a foundation different from a box spring is that it is produced with no moving parts or springs. This construction provides the proper support and durability to today's single-sided mattresses which are designed to provide the same comfort and support as a two sided mattress, but without the need to flip the mattress. See our What's in a Mattress section for more information.

  • Full Mattress

    mattress with an approximate measurement of 53 x 74.5". See Serta's Size Chart to compare mattress sizes.

  • Gauge

    The thickness measure of the wire used in innerspring mattresses. A lower gauge number denotes a heavier wire. Coils made of lower gauges are stiffer (for example 13 gauge), giving the sleeper extra firmness. Higher gauge wires are springier (15 gauge). A quality bed will be equally durable regardless of which gauge you choose. See our What's in a Mattress section for more information

  • Head-to-toe Helicals

    Helical wires in the mattress that are laced from head-to-toe instead of side-to-side. This configuration helps reduce partner motion in the mattress.

  • Helical

    Spirals of wire used to connect adjacent rows of coils in an innerspring. Head-to-toe helical construction is ideal since it helps reduce motion transfer.

  • iComfort Contour Pillow

    This pillow is made with Serta's Cool Action Gel Memory Foam, the same material used in iComfort mattresses. It is designed to contour to the head and neck.

  • iComfort® Directions™ Acumen™ Mattress

    This is an iComfort Directions mattress model featuring Serta's new dual-action gel memory foam technology . Get features and specifications here

  • iComfort® Directions™ Inception™ Mattress

    This is an iComfort Directions mattress model featuring Serta's new dual-action gel memory foam technology . Get features and specifications here

  • iComfort® Directions™ Reinvention™ Mattress

    This is an iComfort Directions mattress model featuring Serta's new dual-action gel memory foam technology . Get features and specifications here

  • iComfort® Epic™ Mattress

    This is an iComfort Directions mattress model featuring Serta's new dual-action gel memory foam technology . Get features and specifications here

  • iComfort® FreeStyle® Pillow

    This pillow is made with Serta's Cool Action Gel Memory Foam, the same material used in iComfort mattresses. It has a unique design allowing it to work with any sleep position, including side sleepers.

  • iComfort® Genius® Mattress

    This is an iComfort mattress model featuring Serta's Cool Action gel memory foam, and designed to provide a firmer feel. Additional details are available here

  • iComfort® Goodnight Refined® Mattress

    This is an iComfort mattress model featuring multiple layers of Serta's Cool Action material and designed to provide a firmer feel.

  • iComfort® Insight™ Mattress

    This is an iComfort mattress model featuring Serta's Cool Action gel memory foam. Additional details are available here

  • iComfort® Prodigy Mattress

    This is an iComfort mattress model featuring Serta's Cool Action gel memory foam. Additional details are available here

  • iComfort® Renewal Refined® Mattress

    This is an iComfort mattress model featuring Serta's Cool Action gel memory foam. Additional details are available here

  • iComfort® Savant™ Mattress

    This is an iComfort mattress model featuring Serta's Cool Action gel memory foam. Additional details are available here

  • iComfort® Scrunch Pillow®

    This pillow is made with Serta's Cool Action Gel Memory Foam, the same material used in iComfort mattresses. It is designed with hundreds of gel memory foam "cushions", allowing you to bunch up the pillow to find the right level of comfort.

  • iComfort® Wellbeing Refined® Mattress

    This is an iComfort mattress model featuring Serta's Cool Action gel memory foam, and designed to provide a firmer feel. Additional details are available here

  • ILD

    Indention Load Deflection. A measurement of foam firmness. Amount of force it takes to deflect a piece of foam 1 inch. The higher the number the firmer the foam.

  • Individually wrapped coil innerspring

    A type of innerspring with an individually wrapped cylindrical coil contained within separate fabric pockets. Each coil is separate so the rest of the bed is not disturbed by the movement of the coils surrounding it. See our Types of Mattresses section for more information.

  • Innerpanel

    An upholstery layer in pillow top and Eurotop mattresses that separates the pillow top and Eurotop part from the rest of the comfort layers below. It also adds a level of comfort to the mattress.

  • Innerspring

    traditional mattress support system constructed using springs enclosed within a padded fabric cover. There are several types of innerspring systems used in today's mattresses. See our Types of Mattresses section for more information on Innersprings.

  • Insulator

    An upholstery layer that sits directly on top of the mattress which helps prevent the upholstery layers above it from pocketing down into, or being damaged by, the innerspring unit. It also reduces lumpiness in the mattress.

  • King Mattress

    mattress with an approximate measurement of 76 x 79.5". See Serta's Size Chart to compare mattress sizes.

  • Knit

    Fabric used in mattress ticking (covers) that is knitted.

  • KoolComfort™ Memory Foam

    The unique open-cell structure of Serta’s exclusive and breakthrough KoolComfort® Memory Foam makes it significantly more breathable, allowing it to dissipate heat away from the sleep surface. It also works to relieve pressure points that can cause tossing and turning.

  • Law Tag

    A legally required tag or label on new items describing the fabric and filling regulating the United States mattress, upholstery and stuffed article (e.g.: pillows, plush toys, comforters, etc) industry. Typically these tags begin with a phrase such as This tag may not be removed under penalty of law except by the consumer. Some states require tags on used bedding as well. See our Serta Customer Care section for more information.

  • Low Profile Box Spring

    A box spring designed to be shorter than the traditional box spring which is beneficial to those looking to reduce the height of the mattress set since today's mattresses are very thick. Typical height of a low profile box spring is 5 - 5.5" (versus an average of 9" for a standard box spring).

  • Low Profile Foundation

    A foundation designed to be shorter than the traditional foundation which is beneficial to those looking to reduce the height of the mattress set since today's mattresses are very thick. Typical height of a low profile foundation is 5 - 5.5" (versus an average of 9" for a standard box spring).

  • Mattress Ticking

    The fabric that makes up the cover of the mattress. Serta mattresses feature a variety of covers from traditional damask to organic cotton, all with a variety of unique, value-added benefits. See our What's in a Mattress Section

  • Memory Foam

    A common name for Visco-elastic foam. Temperature sensitive, slow recovery urethane foam that conform to the body and distributes pressure according to body heat and weight. It comes in many thicknesses, densities, and different levels of softness and firmness. Visco foam may be used as the primary construction material, or as a component of the comfort system of an innerspring mattress.

  • No-Flip Mattress

    See Single-Sided mattress.

  • Non Pro-rated Warranty

    The time frame in the warranty where the item is covered 100% with no replacement or repair costs. Any possible transportation costs are not covered.

  • Offset coil innerspring

    A type of innerspring similar to the open coil but with coil that has a square head. It is slightly more cylindrical in shape than an open coil. See our Types of Mattresses section for more information.

  • Open Coil Innerspring

    A type of innerspring in which the coils are not encase. It is made of hourglass-shaped coils, which are attached to surrounding coils with a small wire spiral called a helical. See our Types of Mattresses section for more information.

  • Pillow Top Mattress

    a type of mattress with an additional upholstery layer at the sleep surface for enhanced cushioning. Its tailoring is less structured than a euro top mattress, which also has an additional upholstery layer. Click here to read about Serta's different comfort choices.

  • Plush Mattress

    a type of mattress with a construction similar to the firm mattress, only with enhanced cushioning at the top of the mattress for a softer feel. Click here to read about Serta's different comfort choices.

  • Pods™ Gel-Activated Support Layer

    Strategically positioned macro-gel discs work with our Comfortlast® Foam Core support system to help provide extra push back support from the deepest part of the mattress and a firmer seating edge. Featured exclusively in our iComfort Directions mattresses.

  • Posturized Center

    The middle third of the Continuous Support innerspring used in the Perfect Sleeper where the coils are positioned closer together to give you better back support and reduce the sagging in the innerspring.

  • Pressure Balancing Design

    Layers of foams and fluffy fibers combine with the support of an advanced innerspring to provide enhanced pressure relieving comfort. This helps reduce the pressure points that can cause tossing and turning.

  • Pressure Points

    Places on the body where capillaries will close due to pressure against that area. When in bed, these pressure points are typically the shoulders and hips. The result may be pain, numbness or morning stiffness. Serta offers many advanced features that help reduce pressure points.

  • Queen Mattress

    mattress with an approximate measurement of 60 x 79.5". See Serta's Size Chart to compare mattress sizes.

  • Quilt

    The upholstery layers, fibers, and cover that is quilted together at the very top of the mattress.

  • Sagging

    Caused by the innerspring unit in the mattress, or the coils in the box spring, breaking down developing a hammock effect. Sagging is in the coils while impressions are in the foams and fibers. See our Serta Mattress FAQs for more information.

  • Serta

    A mattress manufacturer that started in 1931 when 13 independent manufacturers got together to form Guardian Knight Sleep Products. Changed their name to Serta in 1938 by spelling "mattress" backwards and dropping the first "s" a "t" and the "m" at the end. Has since emerged as an international mattress powerhouse with many brands leading the industry in innovation and customer satisfaction.

  • Serta Motion Custom™ Adjustable Foundation

    This Serta adjustable foundation allows you to adjust the head and foot of the mattress using a wireless remote. Plus, it has 9 all-new features including 6 massage levels and Bluetooth connectivity allowing you to sync the base to your smart device. The wireless remote has pre-set positions ideal for watching television, working on your lap top or just lounging. This adjustable foundation will work with any Serta mattress that is adjustable-friendly, including all iComfort and iSeries mattresses and select Perfect Sleeper mattresses. More information is available here

  • Serta Motion Essentials™ Adjustable Foundation

    Serta's basic adjustable foundation allows you to adjust the head and foot of the mattress using a wired remote. This adjustable foundation will work with any Serta mattress that is adjustable-friendly, including all iComfort and iSeries mattresses and select Perfect Sleeper mattresses. More information is available here

  • Serta Motion Perfect® Adjustable Foundation

    This Serta adjustable foundation allows you to adjust the head and foot of the mattress using a wireless remote. Plus, it has a massage option with a timer for enhanced relaxation. The wireless remote has pre-set positions ideal for watching television, working on your lap top or just lounging. This adjustable foundation will work with any Serta mattress that is adjustable-friendly, including all iComfort and iSeries mattresses and select Perfect Sleeper mattresses. More information is available here

  • Serta® Comfort Fiber

    This extra-soft fiber gently contours the body to provide enhanced cushioning.

  • Serta® Comfort XD™ Foam

    This extra deep layer of soft yet supportive foam gently cradles the body to help reduce the pressure build up that can cause discomfort and disrupt a peaceful sleep.

  • Serta® ComfortLast® Foam Core with Ultimate Edge® Support

    This advanced foam support system is designed to help support your body throughout the night, promoting a more restful night’s sleep. Plus, Ultimate Edge® Support strengthens the mattress edges, reducing that annoying edge “roll-off” so you have more room to stretch.

  • Serta® DuoSense™ Hybrid Coil Support System with BestEdge® Foam Encasement

    Combines hundreds of single and double individually wrapped coils that respond individually to each sleep partner. The strategic design provides enhanced support to the areas of the body that need it most, while it works to reduce motion transfer from one sleep prater to another. Plus, Serta’s exclusive BestEdge® design extends the sleep surface and strengthens the mattress edges.

  • Serta® Foam Core

    This all-foam support system is designed to provide proper support throughout the night, while also working to reduce pressure build up that can disrupt a peaceful sleep.

  • Serta® Latex Foam

    Responds instantly to your body to provide gentle cushioning that can relieve pressure points, while also helping to provide enhanced support. Plus, the natural properties of latex help protect your mattress against dust mites.

  • Serta® Memory Foam

    Serta’s Memory Foam gently conforms to your body and contours to your sleeping position for enhanced cushioning and comfort. This helps to reduce the pressure points that can cause you to toss and turn, wake up and shift positions.

  • Serta® PillowSoft™ Foam

    This extra-soft foam gently contours the body to provide enhanced cushioning.

  • Serta® Support Foam

    Serta's Support Foam combines gentle cushioning with extra support, for more firmness at the sleep surface.

  • Serta® Talalay Latex Foam

    Responds instantly to your body to provide gentle cushioning that can relieve pressure points, while also helping to provide enhanced support. Extremely breathable and durable. Plus, the natural properties of latex help protect your mattress against dust mites.

  • Single Bed

    Another name for a Twin Mattress.

  • Single Sided Mattress

    A mattress with the comfort or upholstery layer built on only one side of the mattress. Most of the mattresses made today are single sided in order to eliminate the need to flip a mattress, which can be tedious. There is no loss of durability or longevity with a single-sided mattress. Also called a "no flip mattress".

  • Slat

    Wood strips used at the bottom of a foundation or box spring.

  • SmartSurface™

    This exclusive design works to provide enhanced cooling comfort right at the sleep surface. First, our Cool Balance® fabric technology helps regulate temperature swings that can disrupt your sleep. Then a plush layer of Anti-Microbial Body Loft® fiber provides enhanced cushioning while wicking away moisture that can cause uncomfortable heat build up.

  • SmartSurface™ with MicroSupport® Gel

    This exclusive design combines three technologies to help provide enhanced cooling comfort and support right at the sleep surface. First, our Cool Balance® fabric technology helps regulate temperature swings that can disrupt your sleep. Then a plush layer of Anti-Microbial BodyLoft® fiber provides enhanced cushioning while wicking away moisture that can cause uncomfortable heat build up. Finally, our MicroSupport® gel is infused into premium Serta® Latex Foam to provide an extra level of comfort and support.

  • Specialty Mattresses

    A term used describe "all-foam" mattresses, or mattresses that have a 100% foam core in place of a traditional innerspring system. See our Types of Mattresses section for more information on specialty mattresses.

  • StabL-Base® Foundation

    Serta’s StabL-Base® Foundation provides consistent support across the bottom of the mattress and lasting durability to the mattress sleep set. The unique construction of this foundation isolates the impact of your sleep partner’s movements, so you can sleep undisturbed.

  • Support System

    The innerspring or foam core center of a mattress which provides support for the back. Various types of both innerspring support systems and foam core supports systems are available in today's market. See our Types of Mattresses section for more information on Support Systems.

  • Tack & Jump Quilt Pattern

    A quilt pattern where the quilt machine's needle sews in a certain area then jumps to a different area instead of a continuous running design. Gives the mattress a more level and even sleeping surface.

  • Tape Edge

    The material that is sewn around the top and bottom of most mattresses and foundations that keeps the mattress together and all the upholstery layers in place.

  • Tempering

    The process of adding memory to steel to prevent sagging. There are 2 types of tempering: Heat tempering and electric tempering.

  • Thermo°Cool™ yarn Fabric Covers with TENCEL® fibers

    This exceptionally soft material is designed to help optimize heat and moisture flow at the sleep surface. Thermo°Cool™ high performance yarns are designed to help enhance the moisture wicking capability of the fabric. Plus, TENCEL® fibers can resist the growth of mold, bacteria and dust mites.

  • Topper

    Another name for upholstery foam layers in a mattress.

  • Total Edge® Foam Encasement

    Serta exclusively offers this combination of an advanced encasement design plus a border rod for superior edge support. Total Edge® Foam Encasement creates a total edge-to-edge sleeping surface so you have more room to stretch. Plus, the advanced encasement strengthens the mattress edges to eliminate potential edge “roll off.”

  • TrueSense® Motion Isolating Coils

    These exclusive motion-isolating coils are designed to help reduce motion transfer from one sleep partner to another by responding individually to body pressure and adjusting to support your body without disturbing its neighboring coils.

  • Twin Mattress

    A mattress with an approximate measurement of 38 x 74.5. Typically used for older children or adults who are too tall for a regular twin mattress. See Serta's Size Chart to compare mattress sizes.

  • Twin XL Mattress

    A mattress with an approximate measurement of 38 x 79.5". See Serta's Size Chart to compare mattress sizes.

  • Ultra Cushion Top Mattress

    A mattress top like a pillow top that uses 2 tape edges instead of 1 allowing more upholstery layers to be added.

  • Upholstery Layer

    See Comfort Layer.

  • Visco-elastic Memory Foam

    Temperature sensitive, slow recovery urethane foam that conform to the body and distributes pressure according to body heat and weight. It comes in many thicknesses, densities, and different levels of softness and firmness. Visco foam may be used as the primary construction material, or as a component of the comfort system of an innerspring mattress.

  • Warranty

    Serta's statement of the terms under which we will repair or replace a Serta mattress or box spring. See our Product Warranty and Registration section for more information.

  • Wire Gauge

    A measurement of how large a wire is, either in diameter or cross sectional area. See our What's in a Mattress section for more information on wire gauge.

  • ZoneActive™ 5-Zone Foam Topper

    This specially engineered foam topper features five zones of alternating comfort and support that work to evenly distribute your body’s weight.  This strategic design helps to reduce pressure build up at the key areas of the shoulders, arms and hips for a more comfortable sleep with less potential for tossing and turning.

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