TABU Fits Adult's Neoprene Jacket is a sweat enhancing thermal top made up of neoprene fabric. The breathable Neoprene fabric helps you sweat, which naturally cools you down and helps your skin release toxins. The inner lining helps with drawing the sweat away from you and onto the fabric’s top layer and quickly drying it out, so it doesn’t soak the fabric giving it a dry non-sticky feel.