Tri-Mountain 4.7 oz 100% Microfiber Polyester UltraCool Golf Shirt 100% Polyester 100% microfiber polyester. Short Sleeve. Basket pattern golf shirt Tipped birdseye collar and cuffs. 4.7 Oz Three-button placket. 2" Extended tail Hemmed bottom with side vents. Half-moon yoke UltraCool system to control and manage perspiration