Callaway Men's Big & Tall Golf Performance Heathered Short Sleeve Polo Shirt 94% Polyester/6% Spandex Imported Big and tall. Tonal stitch. 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 OptiSoft: designed for ultimate comfort and performance