Serta Perfect Sleeper® Cascade Range 14" Extra Firm Mattress

Serta Perfect Sleeper®Cascade Range2026 CollectionInnerspring Maximum Support and Lift, with Memory Foam at the Surface The Serta Perfect Sleeper® Cascade Range Extra Firm Mattress is the firmest feel in the 2026 Perfect Sleeper® lineup. The 14" profile is built on higher-density 920 Q4™ linked coils and 5 Zoned Comfort, topped with QuiltLoft™ Memory Foam and a CoolFeel® Plus cover with breathable wool. FeelExtra Firm Profile14" Support920-Density Q4™ Coils Best ForBack & stomach sleepers Comfort LevelThis mattress: Extra Firm Extra Firm Firm Medium Plush Ultra Plush How It FeelsExtra Firm Comfort, Explained Extra Firm is structured and strong with minimal give, so your body stays on top of the mattress instead of sinking in. That lift helps keep the hips from dipping below the shoulders, a common cause of morning back stiffness for stomach and back sleepers. A quilted memory foam layer takes the edge off the surface so firm never feels hard. Ideal for: Back and stomach sleepers who want maximum support What's Inside the Cascade Range Extra Firm Layer diagram for this exact model. Construction · Bottom to Top 1Q4™ Support System 920-density 4-in-1 coils are linked together to spread your weight evenly and deliver long-lasting support, surrounded by BestEdge® Foam Encasement for stability. 25 Zoned Comfort Alternating firm and plush zones are designed to hug the curves of your shoulders, back and hips, adding support where the body naturally curves. 3QuiltLoft™ Memory Foam A conforming memory foam quilted right into the top layer, so pressure-relieving contour starts at the surface. 4CoolFeel® Plus Fabric with breathable wool Serta's upgraded cooling cover fabric paired with a breathable wool layer for a refreshing, cool-to-the-touch feel. CertiPUR-US® Certified foams · Made in the U.S.A. with global components Why You'll Love It Designed to Ease Aches Zoned coil support and pressure-relieving foams are designed to help relieve aches and back pain by keeping your body in natural alignment. Sleeps Cool CoolFeel® Plus Fabric and a breathable wool layer help regulate temperature, while the coil core lets air move through the mattress. Built to Last Linked 4-in-1 coils share the load evenly across the bed, helping reduce sagging and body impressions over time. Classic Innerspring Feel A responsive, on-top-of-the-bed feel that's easy to move on, with the airflow and bounce people love about coils. Zoned SupportSupport Where Your Body Needs It Your shoulders, hips and lower legs press into a mattress the most, while the lower back and upper thighs need extra lift. 5 Zoned Comfort answers both, with plusher zones where you press in and firmer zones where you curve, so the Cascade Range Extra Firm keeps your spine aligned from head to toe. Choose Your Cascade Range Feel 14" ProfileExtra FirmBack & stomach sleepersViewing 14" ProfileMediumAll sleep positionsView → 14.5" ProfileFirm Pillow TopBack sleepersView → 15" ProfilePlush Pillow TopSide sleepersView → Compare the Perfect Sleeper® Collection Series Type Coils Comfort Layer Cover Feels & Heights Cascade Ridge Innerspring 860-density Q4™ PillowSoft® Aire Foam CoolFeel® Fabric Plush 12.5" Cascade Canyon Innerspring 860-density Q4™ PillowSoft® Aire Foam CoolFeel® Fabric + wool Firm 13", Medium 13", Plush 13.5", Medium Pillow Top 14", Plush Pillow Top 14" Cascade RangeTHIS SERIES Innerspring 920-density Q4™ QuiltLoft™ Memory Foam CoolFeel® Plus Fabric + wool Extra Firm 14", Medium 14", Firm Pillow Top 14.5", Plush Pillow Top 15" Cascade Bluff Hybrid 920-density Q4™ EverCool® Supreme Memory Foam CoolFeel® Plus Fabric + wool Medium 13.5", Firm 14.5", Plush 14.5" Every model shares Serta's Q4™ Support System, 5 Zoned Comfort, BestEdge® Foam Encasement and a 10-year limited warranty. 10-Year Limited WarrantySerta covers manufacturing and workmanship defects. CertiPUR-US® CertifiedFoams certified for content, emissions and durability. Made in the U.S.A.Built in the U.S.A. with global components. Adjustable Base ReadyAlso works with box springs, platforms and slatted frames. MATTRESS DIMENSIONS Twin38" W x 74.5" L 14" high Twin XL38" W x 79.5" L 14" high Full53" W x 74.5" L 14" high Queen60" W x 79.5" L 14" high King76" W x 79.5" L 14" high Cal King72" W x 83.5" L 14" high Split KingTwo 38" x 79.5" Twin XLs 14" high *Dimensions are approximate and may vary slightly. Split King ships as two Twin XL mattresses. SPECIFICATIONS Brand Serta® Collection Perfect Sleeper® (2026) Series Cascade Range Model Number 500303921 Feel Extra Firm Mattress Height 14" Mattress Type Innerspring (tight top) Support System 920-density Q4™ Support System, 4-in-1 linked coils Zoned Support 5 Zoned Comfort Comfort Layer QuiltLoft™ Memory Foam Edge Support BestEdge® Foam Encasement Cover CoolFeel® Plus Fabric with breathable wool layer Recommended For Back and stomach sleepers who want maximum support Foam Certification CertiPUR-US® Certified Origin Made in the U.S.A. with global components Compatibility Adjustable bases, box springs, traditional frames, platform and slatted frames, bunky boards Warranty 10-year limited warranty CARE Use a mattress protector to guard against spills and stains and extend the life of your mattress. Don't apply liquids or cleaners directly to the mattress; moisture can stain the fabric and break down the foams. To freshen a soiled area, sprinkle baking soda, let it stand about 15 minutes, then vacuum. Repeat as needed and air the mattress out.