Callaway Men's Big & Tall Golf Performance Color Block Short Sleeve Polo Shirt 95% Polyester/5% Spandex Imported Big and tall. Three button placket. Ribbed collar OptiDri: transfers moisture away from the body to aid in evaporation OptiShield: create a layer of protection from the sun's harmful ways, UPF 50 OptiStretch: interwoven layers of spandex to ensure maximum range of motion so the garment moves with the golf swing