88% polyester, 12% spandex 175GSM UPF 50 sun protection Quick dry, fast drying fabric AFTCO's Tactical LS Performance Shirt is a solid polyester, spandex blend giving this shirt a great feel without sacrificing any performance. This shirt features UPF 50 to help protect you from the suns harmful rays and fast drying quick dry coating for breathability during hot and humid conditions.Features 88% polyester, 12% spandex 175GSM UPF 50 sun protection Quick dry, fast drying fabric