After launching a successful line of Men’s superhero t-shirts Under Armour is back with shirts in Boys sizes. The Boy’s Under Armour Alter Ego sizes range from YXS to YXL and are perfect for the young superhero in your life. Head on over to UnderArmour.com to check out Spider-Man, Iron Man, Captain America, Hulk and more!

UA Baselayers wick sweat, keep your energy up, and keep you cool. But you know what else they do? They make you feel like you can do anything. They turn you into exactly what you want to be, every time you workout or compete. This is Under Armour® Alter Ego: the baselayer built for heroic performance.