The Original mattress uses three layers of premium foam, which combine to give it a supportive feel with great bounce. The top foam layer sleeps cool and has a fast recovery time, meaning it won't leave impressions or make you feel “stuck.” The middle memory foam layer provides contouring and pressure relief. Because it’s the middle layer, you won't experience the heat or “sinking” feeling often associated with memory foam. The contouring effect gives you a slight hug and alleviates lower back pains.