The gel-infused memory foam captures and distributes heat, allows air flow, and helps regulate sleeping temperature - keeping you cool and comfortable while you sleep. It instantly makes any mattress more restful, comfortable and supportive. The ultra soft and breathable rayon from bamboo cover is ventilated to allow for maximum airflow. Features: Hypoallergenic Cover: 35-percent Rayon from bamboo and 65-percent polyester CertiPUR-US certified memory foam Instantly upgrade your mattress for better sleep Gently conforms to your body for extra support Breathable cooling gel memory foam Outer cover: 35-percent rayon from bamboo and 65-percent polyester Outer cover: Bottom has anti skid fabric Inner cover: 100-percent polyester fabric Elastic on all four corners Removable, machine washable cover Dimensions: Twin: 39 inches x 75 inches x 2.5 inches Full: 54 inches x 75 inches x 2.5 inches Queen: 60 inches x 80 inches x 2.5 inches King: 76 inches x 80 inches x 2.5 inches Memory Foam Details: Resistant to dust mites, naturally antimicrobial Temperature-smart memory foam responds to body heat and movement, reshaping to distribute body weight and relieve pressure points to improve circulation Never needs turning