New, MARUCCI F5 SL 10, 4TH GEN USSSA Senior League 2 3 4" Barrel Baseball BAT ( 5, 8, and 10), 30 20 oz. black White Uses a METAMESH upper with GNXFP1175 RHT 11.75" Wht Blu Uses a METAMESH upper with 2x stitched reinforcement in high wear areas Constructed with genuine leather for lightweight softball turf shoes Feather light GLIDE midsole relieves knee and back pressure TPU shank in the arch and the molded heel work to increase stability and fit IGNITE outsole uses a single form tread pattern for uniform support and rotational traction on the diamond PROTECTIVE ELBOW GUARD Designed to be worn in the batter's box during baseball softball games GAME READY No molding required FULLY ADJUSTABLE Elastic strap allows for a preferred fit IMPACT SHIELD Flexes for improved comfort and fit YOUTH & ADULT SIZES AVAILABLE it is not legal for use in Little League Baseball The 2024 Marucci F5 4th Generation USSSA Senior League Baseball bat boasts a 2 3 4 inch barrel diameter