Wilson A2000 1613 Superskin First Base Mitt. 12.25 inch. Developed by Andres Galarraga, the Wilson A2000 1613SS First Base Mitt features a design with a single heel-break allowing for a thumb to middle finger break-in. The 1613SS First Base Mitt is constructed using Wilson's amazing Pro Stock leather and SuperSkin material. The Pro Stock Leather breaks in perfectly and the SuperSkin material helps reduce weight for a light, long lasting glove. The Wilson A2000 1613SS First Base Mitt also comes equipped with DirLex Wrist Lining, designed to help keep your hand cool and dry for better feel when closing the glove. 12.25 inch First Base Model. Single Heel Break Design. Pattern developed by Andres Galarraga. Pro Stock Leather combined with SuperSkin for a light, long lasting glove and a great break-in. DriLex Wrist Lining to keep your hand cool and dry.