Features a 4-way stretch knit with Lycra. Whispershield 5/8" TheraCool Advanced Cooling Gel and 1 1/2" Enhanced Plush Quilt. Open-Cell Visco-Elastic Foam responds to body weight and temperature. Performance Firm Foam provides excellent support, durability, and a comfortable sleep surface. TheraWrap individually wrapped coils provide a uniform sleep that conform independently, reducing motion transfer.10 years non-prorated warranty.