The newest addition to the Smitty product line: Smitty "Body Flex" Umpire Shirts. These shirts are made with high quality moisture management-95% Polyester/5% Spandex fabric. Vented side panels and vented bottom back panel to provide stretch and comfort on the field. BBS-314 MAJOR LEAGUE STYLE Short Sleeve Shirt! Color Body with Vented Side and Black Panel 95% Polyester/5% Spandex Moisture Management Fabric Breathable-vented Side Panel and Lower Back Panel 3 Button Edge Stitched Placket Double Needle Left Chest Pocket and Hems Extra Tuck-In Length Split Tail Bottom Sized to Accommodate Chest Protector