Louisville Slugger 125 Series Cream First Base Mitt 13 inch (Left Handed Throw) : Louisville Slugger 125 Series First Base Mitt. Built for superior feel and an easier break-in period, the 125 Series is constructed with extra-tough dye-through lacing and genuine cowhide leather to provide unmatched strength and durability while wicking away perspiration with our Slugger Touch finger lining.