With 2000 firm springs sitting at the core, this firm hybrid mattress helps evenly distribute your body weight for a relaxed and supportive night’s sleep. With a firm sleeping surface, the Uno E-Volve Sleep Comfort 2000 Firm hybrid mattress assists with temperature regulation and helps align your spine. The top layer premium comfort foam together with the individually wrapped firm springs will spread your body weight evenly across the mattress for increased support and comfort. The bottom layer endurance support foam is a strengthened base that gives you stability.