Dr. Nap is a full bonded block mattress designed to give your back the maximum support and keep your spine healthy and maintaining the right posture. You back or spine must maintain the right posture when you are sleeping so as to ensure quality sleep without any disturbance and that is exactly what Dr. Nap assures. The mattress is firm and uses superior fabric quilt on both sides for more comfort. Dr. Nap mattresses come in a thickness of 4” and 5 years guarantee.