Simmons Curv 4.5-inch Memory Foam and Fiber Topper - Twin 4.5-inch Memory Foam and Fiber Topper -- Features an innovative 2-piece construction, produced with open cell memory foam. Memory foam is soft, yet supportive. Open cell memory foam allows for more airflow through the foam resulting in a more comfortable sleep. Set includes a 3-inch memory foam topper and a 1.5-inch blended gel fiber mattress pad. Fiber pad includes stretch to fit skirt to hold the memory foam snugly in place on the bed. Designed to fit mattresses up to 17 inches. Rejuvenate a tired, worn mattress, and eliminate pressure points for a more restful sleep. 1.5-inch 100% polyester piberfill baffled cover, filled with polyester blended gel fiberfill. 15-inch stretch-to-fit skirt fits mattresses up to 17 inches. Twin measures 37" x 73" x 4.5" - Foam Density 3.0lb