Callaway Men's Big & Tall Golf Performance Stripe Short Sleeve Polo Shirt 92% Polyester/8% Spandex Imported Big and tall. Three button placket. Ribbed collar OptiDri: transfers moisture away from the body to aid in evaporation OptiStretch: interwoven layers of spandex to ensure maximum range of motion so the garment moves with the golf swing OptiVent: fabric allows for the garment to have maximum breath-ability