This premium driver-style glove is constructed with premium grain cowhide and stitches are sewn with DuPont? Kevlar? fiber. The keystone thumb is the most ergonomic thumb style available and enhances comfort for the user. Premium grain cowhide provides abrasion resistance. Sewn with aramid fiber for added durability and heat resistance. Ergonomic keystone thumb improves durability, comfort, and dexterity while reducing hand fatigue. Open cuff allows for easy donning and removal. DuPont? and Kevlar? are trademarks or registered trademarks of E.I. du Pont de Nemours and Company.