Neoprene - Not Just for Wet Suits Our neoprene gloves are thick, waterproof, and an effective replacement for latex and vinyl products. Neoprene is a synthetic rubber that maintains flexibility over a wide range of temperatures.  The 5434 is a seamless black glove that is 30 mil in thickness and is unlined.  It is 14 inches in length, has a straight cuff and a textured grip.