Made with the new Body Flex® high performance poly/spandex fabric. Offers 4-way stretch technology for maximum range of motion. Body Flex® fabric is exceptionally soft and breathable, along with having top notch moisture management characteristics. Everything you want in a high performance shirt. Self fabric Byron collar and rib knit cuffs. Similar to the fabric worn by FBS football officials. Smitty USA has become the leader in manufacturing of dye sublimated shirts for sports officials nationwide. All Smitty Apparel products are designed by one of the top officials in the world, for officials. Made In The USA.