Diamond DG-1B275 first base mitt is a full grain American steer hide mitt with 1B-TRAP Web System that is designed with a single post web with a rounded back cap to form a deeper and wider pocket than other 1B mitts. It has an open back and adjustable strap for a secure fit. Made with a reinforced contoured finger pad for added comfort and grip while catching the ball. 12.75-Inch 1B mitt with an inside palm pad for added protection.