Under Armour Boys Freedom USA Flag Short Sleeve T Shirt. Size S. Features round neckline, short sleeve, black shell, Under Armour logo in red, white, and blue, and the flag design on the sleeve, 60% Cotton, 40% Polyester. EUC / excellent used condition. Tags: fall, winter, spring, summer, UA, Under Armour, boys, short sleeve, round neck, usa, flag, freedom, 4th of July, athletic, athleisure, activewear, school, casual.