The All-Star MVP-PRO Series Adult Chest Protector is a top-of-the-line, SEI Certified piece of protective gear, meeting NOCSAE standards for Commotio Cordis to safeguard against chest impacts. Featuring innovative 3DU Bar technology, this chest protector increases the blocking area by 50%, ensuring block balls stay within reach. The redesigned Delta Flex harness system provides a secure yet breathable fit for maximum mobility, while the CON4M Fit Tech delivers formable collarbone protection for a customized, comfortable fit. Ideal for serious players, this protector is designed for a 16.5" size, offering superior protection and performance! Features: SEI Certified: Meets NOCSAE standards for Commotio Cordis for superior chest impact protection 3DU Bar Technology: Increases blocking area by 50%, keeping block balls within reach for better control Delta Flex Harness System: Redesigned for a firm yet breathable fit, ensuring maximum mobility during play CON4M Fit Tech: Features formable collarbone protection for a customized, comfortable fit Sizing: 16.5" for optimal coverage and protection All-Star MVP-PRO Series Adult Chest Protector in USA.