Sleep Studio 2-Inch ViscO2 Active Mattress Topper, Full Revolutionary, breathable, visco-latex hybrid material provides the comfort of memory foam with the active support of latex ViscO2 Active is provides firmer, more buoyant support than traditional memory foam for a better sleeping posture and restores your mattress with added support, pressure relief and air circulation 2-inch convoluted peak and valley design provides added air circulation to keep you comfortable and gives you firmness options - tips down for firm, tips up for medium firm. Open cell material provides better air circulation for a more comfortable sleeping temperature Formula in a 4 lb. density uses natural ingredients to reduce impact on the environment