【30D Cooling Gel Memory Foam】:3 Inch Cooling Gel-infused Memory Foam Mattress Topper is made of 30D high-density aviation grade memory foam and gel-infused beads,High-density memory foam provide adaptive comfort and support, helps relieve common pressure points and prevent you from sinking into foam. 【Removable Bamboo Fabric Cover】:Use skin-friendly and breathable bamboo fiber, with adjustable elastic straps and anti-slip surface backing to prevent sliding. Zipper closure for convenient disassembly and washing. 【Improve Sleep Quality】: 3”memory mattress topper conforms to the curves of your body to relieve pressure and pain, allows air flow and provides a great night sleep.