Green Tea Gel Twin Mattress: Green tea and cooling gel infused into the memory foam mattress relieves temperature issues while maintaining all the positive properties of the memory foam. Air vents in the top foam layer allow you to experience unprecedented refreshing sleep. A high-grade, flexible support foam completes the bottom, providing lasting durability and support for its top layer of gel memory foam. Low Profile Mattress Suitable for Kids Bed. Twin mattress for kids fit all bed frames, it is ideal as a bunk bed mattress, day bed mattress, trundle bed mattress, or kid mattress. Medium firm mattress. The 5 inch thickness of our kids mattress makes the bed rails safer and less likely to fall and roll over. Fiberglass Free Mattress for Rest Assured. Twin memory foam mattresses are surrounded by a fiberglass-free mattress sock to create an effective flame retardant layer. Foam mattress made with CertiPUR-US certified foam, allowing both you and your child to sleep with peace of mind.