【Gel Memory Foam】：The memory foam is infused with cooling gel that traps and disperses heat to improve your sleep experience. The memory foam is CertiPUR-US certified. 【Soft and comfortable sleep】：3-inch mattress topper with high-density memory foam provides adaptive comfort and support that helps relieve common pressure points and prevents you from sinking into the foam, allowing you to sleep more comfortably. 【Bamboo Fiber Cover】：With skin-friendly and breathable bamboo fiber, zipper closure, easy to disassemble and clean, bamboo fiber mattress cover is OEKO-TEX certified.