Add award-winning Leesa comfort to any mattress. The Leesa Mattress Topper is designed to support all body types with high-quality foam that's breathable for cool, comfortable sleep. Made with high-quality, high airflow foam for a cooler night's sleep. The Mattress Topper has a soft and breathable knit cover to keep you cool and comfortable. Meticulously designed and assembled in the USA with high-quality materials. Queen, king, and California king sizes Breathable Cool-Knit Cover: 87% Polyester, 13% Viscose. 2" Contouring Memory Foam, CertiPur-US Certified