Replaces the Smitty Performance Mesh Umpire Shirt 95% Polyester 5% Spandex High Performance Moisture Management Fabric Matching rib knit collars and cuffs trim combinations 3 button edge stitched placket Double needle left chest pocket and hems Extra tuck-in length split tail bottom Sizing: Shirts are cut wider to accommodate for a chest protector - This means you should not have to size up. If anything, some umpires choose to size down when working the bases. See sizing dropdown menu for chest measurements. Specifications Sized to accommodate a chest protector- size down for wearing on the bases. 100% polyester mesh Matching rib knit collars and cuffs trim combinations 3-button edge stitched placket Double needle left chest pocket and hems Split tail bottom