The 4-inch 5-zone memory foam topper is made with premium CertiPUR-US certified foams for maximum comfort and better sleep. Featuring 5 different body zones, our topper provides multiple points of contact for pressure relieving comfort all throughout the body. It's infused with gel to reduce trapped heat for cool and refreshing sleep. Features 5-Zone designed with different points of contact for enhanced sleep Gel infusion for cool and refreshing sleep Pressure relief with body-conforming memory foam Motion isolation for undisturbed sleep CertiPUR-US? certified foam 3-year manufacturer's warranty