The Primo International Lexis 12 in. Gel Memory Foam Mattress provides a place where you can just lay down, relax, and drift off to a restful sleep. This mattress features a base layer of high-density polyfoam. It's topped with two inches of water-based, gel-infused memory foam that will disperse heat for all-night comfort. Combined, the layers of foam relieve pressure points and reduce motion transfer. For safety, a flame-resistant barrier is incorporated into the foam. It's surrounded with a 100% polyester knit zippered cover.