The 2021 Sealy Posturepedic Hybrid mattress is upgraded with Response Pro™ coils for extra support with layers of breathable, body-hugging ComfortSense™ Gel Memory Foam and traditional foam for extra comfort. The Duraflex™ Coil Edge increases durability, and the soft knit cover is treated with MoistureProtect™ to help keep you cool, and Surface-Guard Technology™ to keep the mattress protected. Available in a Medium feel.   Sealy was among the first to create the hybrid pairing the best qualities of innerspring and memory foam mattresses to deliver best-of-both-worlds comfort. Carefully engineered coils adapt and support every part of your body, while specialty foams conform and cushion for yuour most comfortable night's sleep. Mattress Top Type: Tight Top Mattress Type: Hybrid, Innerspring Included: 1 Mattress(es), 1 Box Spring(s) Features: Cooling, Fire Resistant, Cushioning Layer, Antimicrobial, Foam Layer, Wrapped Coils, Non-Toxic, Cooling Layer, Adjustable Base Compatible Additional Information: Suitable for Adjustable Bed Frames, Conforms To Body Coil Count: 568 Coils Manufacturer Warranty: 10 Year Limited Bed Size: Twin Maximum Weight Limit: 500 Lbs Base Material: 100% Polyurethane Comfort Type: Medium Mattress + Box Spring Measurements: 21.25 Height/Inches Care: Spot Clean Certifications And Listings: Certipur-Us Certified, Cpsc - 16 Cfr 1632 Compliant, Cpsc - 16 Cfr 1633 Compliant Country of Origin: Made in US Visit our Furniture & Mattress Customer Care Center for delivery options, protection plans and other services. Problem with an order or need help with a return? Our Furniture & Mattress Customer Service agents will be happy to help. Give us a call at 1-800-442-7902 Don’t forget to print off your delivery checklist to avoid any delays or issues when delivering your item. 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. This mattress meets the requirements of 16CFR Part 1632 (federal flammability (open flame) standard for mattresses and mattress pads This mattress meets the requirements of 16CFR Part 1633 (federal flammability (open flame) standard for mattress sets) when used with foundation