Experience Back Magic. Duropedic DP4 mattress is designed to give you magical back support. DP4 encompasses specially crafted Duroflex 3-zone Pocket Spring technology for Full Prone Support (FPS) sandwiched between layers of high density PU Foam and topped with Duropedic layer with 3-Zone Active Grooves for supporting the neck, back and spine at an appropriate posture what the body requires. These Active Grooves will enhance the air circulation and makes it a perfect all seasons mattress. Enjoy the perfect blend of luxury and technology.