【6 inch Twin Size Mattresses】The twin bed mattress consists of gel memory foam and high-density foam layering. 1 inch of gel memory foam creates a cooler sleeping experience than traditional memory foam. 5 inches of high-density base support foam provides you with stable support. 【Comfortable Sleep】Gel-infused mattress technology responds to body temperature and keeps you cool by dispersing body heat, providing a healthier sleep experience and allowing you to sleep soundly all night long. 【Straighten Your Spine】Kids twin mattress is made of foam with high-density base support that bends around the child's body and is designed to adjust the spine, which is essential for the child's development, making it the best choice for child sleepers.