IncStores 3/8" Soft Rubber Interlocking Gym Tiles - Perfect mats for Home Gyms, Insanity, P90x, Aerobic, Cardio and More Shock absorbent and slip resistant. Detachable edge pieces allow each tile to be either a center, corner, or border tile. Rubber top surface bonded to closed cell EVA foam backing. Not recommended for use in areas where heavy free weights and weight equipment will be used. Sound absorbent and insulating.