Experience the trusted comfort of Serta with Serta® Classic®. Featuring a soft, breathable cover, Pillowsoft® Aire Foam, and an 800-density coil support system, this mattress helps you sleep comfortably and wake ready to ease into your day. With 3 zones for lower back support, this mattress balances cool breathability with responsive support for a classically comfortable rest. Plush Euro Top- great for side sleepers for extra comfort at the shoulders, hips and lower back. Breathable cover a soft, breathable cover helps you rest and wake refreshed. 3 zoned body support offers 3 separate zones to provide lower back support for Classic comfort. A breathable memory foam helps enhance airflow and heat dissipation for a feeling that can only be described as a cool, contouring type of comfort. This 800-coil density system provides contouring, cradling support and minimizes motion transfer. Certipur-US® Certified. Designed and built in USA. Adjustable friendly. 10 year warranty  Mattress Top Type: Euro Top Mattress Type: Innerspring Included: 1 Mattress(es) Features: Cooling Layer, Foam Layer, Wrapped Coils, Full Support, Cushioning Layer Additional Information: Conforms To Body, Relieves Pressure Points, Suitable for Adjustable Bed Frames, Eliminates Motion Transfer Coil Count: 324 Coils Manufacturer Warranty: 10 Year Limited Bed Size: Twin Measurements: 74.5 Length/Inches, 12.5 Height/Inches, 38 Width/Inches Maximum Weight Limit: 850 Lbs Base Material: 70% Polyurethane, 30% Metal Comfort Type: Plush Care: Spot Clean Certifications And Listings: Certipur-Us Certified Mattress Height: 12.5" Country of Origin: Made in US Includes mattress only. Mattress plus box spring option also available.