Light Gray Grain Premium Goatskin Leather Drivers Shirred Elastic Back of Wrist Keystone Thumb - A keystone thumb provides added reinforcement and padding at the point on the glove that receives the most wear. It is a double thickness of leather that overlaps onto the base of the thumb. Turned Leather Binding These gloves are one of our best Unlined Drivers Gloves. High Quality and Comfortable Fit.