PERSONALIZED SUPPORT: 3 select foam layers provide tailored pressure relief and targeted ergonomic support to make this the perfect option for SIDE SLEEPERS and toss and turners. Exclusive SupremeSupport 2.5 Memory Foam with 2.5x more cushioning than other mattresses to help you relax and recharge. BREATHABLE COMFORT: Breathe Knit cover pillow top for excellent airflow. Hundreds of individually wrapped steel coils and reinforced side perimeters to cradle sleepers and limit motion transfer. MEDIUM FEEL(Midnight): Premium pressure relieving foams contour to your hips and shoulders for a balanced feel; 6 out of 10 on firmness scale with 10 being the firmest. EASY SET UP: Compressed and rolled for easy and convenient parcel shipping and set up. 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 Midnight is our award winning medium-feel hybrid mattress recommended for side sleepers, those who toss and turn at night, and is great for couples. It is one of the most popular models in our collection.