Designed by expert mattress crafters, the LulaaBED 8" Emerald Firm Mattress is made from the highest-quality materials available. Layers of high-density open-celled foam and base foam provide support, while the Visco Memory Foam offers contouring comfort. The mattress is best for back sleepers and stomach sleepers, but is not recommended for side sleepers. This LulaaBED mattress features a removable, washable cover; simply un-zip and wash whenever the exterior of your mattress needs refreshing. This mattress set includes the LB200 Adjustable Base. The adjustable base has many benefits. You can adjust the head tilt and foot lift positions for relaxation while reading in bed or watching TV. The adjustable base also provides a customizable sleeping experience. At a press of a button, you can set the base to the most comfortable position for sleeping as well as to help relieve pressure points.