The Mizuno(r) GXF51 MVP Series 12.5-in baseball 1B mitt offers you a game-ready feel and flexibility in a durable leather construction. Features and Benefits Webbing: Open--This web allows you to see the ball coming into the pocket and it makes it easier to dig the ball out to make a quick throw. Material: Leather--Offers an ideal combination of durability and feel. Backing: Finger Slot--Provides more control, while easing the shock of hard hit balls. Key Specs Model Number: GXF51 User: Adult