Tempur-Adapt ® Series Medium Hybrid Made from all-new combinations of our proprietary materials, the TEMPUR-Adapt® series adapts and responds to your body’s needs throughout the night. Continuously conforming. Relieving pressure. Reducing motion. Delivering just the right sleep for your body so you wake up feeling powerful. It’s not mechanical. It’s material. And it’s personal. A unique cell structure within our material is activated by the unique characteristics of your body. Your weight, your shape, your temperature, your sleep position. Even as these elements change throughout the night, our legendary material continues to comfort, support and conform to your body—unlike ordinary memory foams, which don’t continuously adapt or traditional spring mattresses, which simply push up on you wherever you push down on them. This is a difference you can feel allover. Not just tonight, but tomorrow too. Key Highlights Tempur-ES® : The tighter, slightly rougher cell structure of TEMPUR-ES® creates a softer feel that works in combination with other layers to support and relax. Original Tempur® : Originally formulated to absorb the G-Force of NASA astronauts travelling into space and then perfected by us for sleepers—it’s as comfortable and supportive as it is iconic . Cool-To-Touch Cover: Premium knit technology for superior cool-to-touch feel. Crafted from ultra-high molecular weight yarn it moves heat away from your body. Hybrid Technology: 1000+ premium spring coils designed in-house to work with our proprietary material – made for easier movement DISCLAIMER: Split King and California King are each made up of 2 pieces. You must select a quantity of 2 for these sizes for a complete foundation set. Mattress Top Type: Tight Top Mattress Type: Hybrid, Innerspring Included: 1 Mattress(es) Features: Antimicrobial, Cushioning Layer, Wrapped Coils, Adjustable Base Compatible Additional Information: Conforms To Body Coil Count: 1160 Coils Manufacturer Warranty: 10 Year Limited Bed Size: Twin Measurements: 38 Width/Inches, 11.8 Depth/Inches, 74 Length/Inches Base Material: 100% Polyurethane Comfort Type: Cushion Firm Care: Spot Clean Certifications And Listings: 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. Includes mattress only. Mattress plus box spring option also available.  This mattress meets the requirements of 16CFR Part 1633 (federal flammability (open flame) standard for mattress sets) when used with foundation