You've always dreamed about getting a perfect night's sleep - now enjoy one night after night! Originally developed by NASA to cradle astronauts from G-Forces during lift-off and re-entry, memory foam is a dream for anyone who has trouble sleeping. Just place this mattress over your existing mattress and you'll have a sleep system that provides virtually perfect support for your entire body. Features 1.5" energy absorbing "high-density" deluxe memory foam for total comfort. 100% hypoallergenic and anti-microbial. King (74" x 78") Size King This is a customer return. Customer returned items have a 7 day return policy.