It’s the top of the line developed by Major League umpire Joe West, manufactured for maximum protection! This chest protector provides you with a level of protection demanded by professional umpires. Accept nothing less then the best. Sized to fit your body; adjustable for comfort. Select your protector based on your coat size. Size S-M for coat sizes under 38. Size M-L for coat sizes 38 and up. Sized to fit your body; adjustable for comfort. One of two protectors endorsed by Major League Baseball for use by its umpires.