Meca over gloves have been designed to be worn over normal mechanics gloves when additional protection against heat is required. Wear with your own gloves for added heat protection Knuckle protection reduces the risk of "key rash." The shock absorbing foam layer is ideal when using impact wrenches. Sparco Mecha overgloves are made from a flame retardant material with flame retardant silicone inserts. They are ideal for mechanics who only need occasional heat protection. They can be quickly and easily slipped on over mechanics gloves when needed.