Mizuno MVP Prime GXF50PB2 12.5" Adult Baseball First Base Mitt 12.5" First Baseman's Mitt Center Pocket Designed Patterns: Pattern design that naturally centers the pocket under the index finger for the most versatile break in possible. Bio Soft Leather: Professional style smooth leather that has the perfect balance of oil and softness for exceptional feel and firm control that serious players demand. PlusGrip Thumb: Ultra comfortable padded thumb slot. Professional Level Lace: Same durable lace that's offered in our professional level gloves. Outlined, embroidered logo. - New Wrist Design.