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, plus a gel memory foam upgrade for even more pressure relief, this mattress balances cool breathability with responsive support and pressure relief for a classically comfortable rest.Firm - ideal for stomach and back sleepers with extra support for heavier sleepers.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: Tight TopMattress Type: InnerspringIncluded: 1 Mattress(es)Features: Foam Layer, Cooling Layer, Wrapped Coils, Cushioning Layer, Full SupportAdditional Information: Conforms To Body, Suitable for Adjustable Bed Frames, Eliminates Motion Transfer, Relieves Pressure PointsCoil Count: 324 CoilsManufacturer Warranty: 10 Year LimitedBed Size: TwinMeasurements: 12.5 Height/Inches, 38 Width/Inches, 74.5 Length/InchesMaximum Weight Limit: 850 LbsBase Material: 70% Polyurethane, 30% MetalComfort Type: FirmCare: Spot CleanCertifications And Listings: Certipur-Us CertifiedMattress Height: 12.5"Country of Origin: Made in US Includes mattress only. Mattress plus box spring option also available. Serta Classic™ Andria 12.5" Firm Tight Top - Mattress Only