These mechanic work gloves are made of goat leather on the palm and fingers. The back of the hand is made of breathable bi-stretch polyester that offers excellent comfort as well as high visibility protection. The 40g Thinsulate lining keeps your hands warm and the polyester mesh on the back of the fingers is breathable. Leather knuckle protection and reinforced wing thumbs help prevent wear in critical areas. Elastic wrist with Velcro closure provides a snug fit while keeping debris out of the glove.