Revive 3 Inch Gel Memory Foam Mattress Topper, Twin XL 3" premium Twin XL Gel Memory foam mattress topper for a better, cooler night's sleep The CertiPUR-US seal is your assurance that the foam in your mattress overlay has been tested and certified by an independent laboratory to meet specific criteria for physical performance, indoor emissions and environmental stewardship. Made without PBDE flame retardants and formaldehyde Made without phthalates, mercury, lead, and other heavy metals regulated by the Consumer Produce Safety Commission Comes with high quality, special 4-way stretch fabric cover that works with the foam for optimum comfort