The Mizuno Pro series features the highest quality leather and raw materials available in the world.US Kip Leather: Tighter fibers creating more durability and a premium, soft feel for a top of the line performance you can trust.Shell Leather Palm Liner: Same premium leather on the outer shell of the glove as the palm liner, giving you a durable and consistent feel.Player Pocket Designs: Pockets tailored specifically to the player's needs and how they prefer to break-in their glove. Recommendations:Shallow: Middle Infielders. Regular: All. Deep: Shortstops and 3B.Comfortable, hand based patterns: Sets your pocket under the web and helps to shape your glove like a pro.