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. PLUSH FEEL: We've taken luxury to the next level with the Sunset Elite Mattress. Treat yourself to 5 individual foam layers, coming together to provide a soft feel while cradling your hips and shoulders in side 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 Sunset, a soft hybrid mattress, layers responsive foam over individually pocketed coils. Copper-infused memory foam draws heat away, and an optional GlacioTex cover wicks away warmth and moisture for cool sleep. Standard is a breathable stretch-knit tencel cover. Ideal for side sleepers seeking pressure relief and a plush feel.