The LX-Class 13.5” mattress combines layers of pressure-relieving memory foam with motion-reducing Zoned T3 Pocketed Coil® to create the perfect blend of hybrid comfort. The cover provides anti-microbial protection. In addition, BlackICE™ with plant-based cooling technology helps provide up to 18% more cooling power to keep you comfortable throughout the night. The cushion firm comfort level is great for back and stomach sleepers. This mattress is CertiPUR-US certified to be made without ozone depleters. Mattress protector recommended.