Soft Neoprene is a softer (45 durometer) Neoprene and more flexible blend of CR (Neoprene) and NBR (Nitrile) rubbers. Soft Neoprene offers the same excellent all around chemical and ozone resistant qualities or other Neoprenes (Hard Neo and Neoprene) in a more elastic and supple state. This is commercial grade material and is not recommended for severe oil and ozone-resistant applications.