Tri-Mountain Performance 118 Action 100% Polyester This 6.5 oz; 100% polyester waffle knit golf shirt features Tri Mountain Ultra Cool moisture wickin Accented with contrast underarm panels; Collar and half cuff trim for a sporty look. Three button placket; Half moon yoke back and square bottom with side vents. Sizes: All Colors: S; M; XL; 2XL; 3XL; 4XL. Extended Colors Sizes: 5XL; 6XL; LT; XLT; 2XLT; 3XLT; 4XLT; 5XLT; 6XLT.