These glove box gloves are made of Hypalon. Hypalon (also known as CSM or chlorosulfonated polyethylene) is a soft, comfortable, and waterproof synthetic rubber. It resists abrasion; oxidizing chemicals; temperature extremes; and ultraviolet, natural, and artificial light. Thicker gloves provide better protection and have a longer lifespan, but are less tactile than thinner gloves. Gloves are permanently installed in the box and workers put their hands in the gloves from outside the box.