​Featuring 825 density coils, this supportive mattress offers zoned comfort and pressure relief where you need it—with upgrades available for even more cooling and comfort. Gel memory foam lumbar support band provides support for the lower back and hips Serta® pillowsoft® aire a soft foam provides enhanced cushioning for exceptional comfort and promotes airflow through its unique, gently rippling design Antimicrobial mattress protection - keeps your mattress fresh and clean from odor causing bacteria. This product protects the mattress but does not protect users against bacteria, viruses, germs or other disease organisms. Custom support coil system - 805 individually wrapped coil system in addition to providing contouring, cradling support, this system of up to 805 individually wrapped coils features serta’s bestedge® foam encasement technology An extra-deep foam rail to help reduce edge roll-off and extend the sleep surface. Proudly 100% USA assembled Compatible with most frames, platforms, and adjustable bases We only use foam that is certipur-us certified  Mattress Top Type: Tight Top Mattress Type: Innerspring Included: 1 Mattress(es), 1 Box Spring(s) Features: Gel, Antimicrobial, Wrapped Coils, Foam Layer, Adjustable Base Compatible Additional Information: Suitable for Adjustable Bed Frames, Conforms To Body Coil Count: 493 Coils Manufacturer Warranty: 10 Year Limited Bed Size: Twin Maximum Weight Limit: 1000 Lbs Base Material: 90% Metal, 10% Foam Comfort Type: Plush Mattress + Box Spring Measurements: 19.5 Depth/Inches, 40 Width/Inches, 75 Length/Inches Care: Spot Clean Certifications And Listings: Certipur-Us Certified Country of Origin: Made in US Set includes mattress plus box spring/foundation. King and Cal. King mattress sets feature 2-piece side-by-side foundations for easier navigation in tight spaces.