The green tea infused memory foam conforms to your body’s natural curves and promotes air circulation. It contains breathable Liquid Gel Flex Foam to regulates temperature and keeps you cool and comfortable through the night.The inner cover of the mattress does not contain fiberglass or other fire-retardant chemicals, which will protect against skin irritation, breathing problems, and health risks for you and your family. Your Mainstays mattress will be compressed in a box and smartly shipped to your door for convenient and easy setup. Allow 48 hours for the mattress to fully expand before laying down for the night.