ENHANCED COOLING: Treat yourself with our most advanced cooling feature. This phase change fabric optimizes your sleep temperature from the minute you lie down providing you with all-night cooling comfort. MEDIUM FIRM FEEL: 5 high-density foam layers: We've taken luxury to the next level with the midnight Elite mattress. Treat yourself to 5 responsive foam layers, each coming together for a medium feel that cradles and supports your body in stomach and back sleeping positions. RESTORATIVE SLEEP: Advanced lumbar support, plus hip & shoulder contouring to help relieve pressure & pain. Microcoils for motion isolation, & reinforced edges ensure you & your partner can utilize the entire bed without waking each other up. TALLEST MATTRESS: Combines 5 carefully chosen comfort layers and a separate microcoil comfort layer, resulting in a 15 inch mattress that exudes luxury from top to bottom. Each Elite mattress ships in two separate boxes. ONLY THE BEST MATERIALS: This bed in a box mattress is Fiberglass-free, GREENGUARD Gold certified, and made with CertiPUR-US certified foams. Each mattress is carefully assembled in our own Arizona facility and delivered right to your door. We want you to be happy with your mattress and that's why we offer a 120 night sleep trial and a Limited Lifetime Warranty. The Helix Plus Elite, the premium model in this mattress range, caters to plus-sized sleepers. It boasts top-quality materials in its foam and coil layers, incorporates cooling technology in the top cover for hot sleepers' comfort, and stands at a lofty 15 inches.