Under Armour Kids - Knockout Tank (Big Kids). Color White/Beta. Low Stock. On sale for $23.19. MSRP $28.00.. 4.7 out of 5 stars9 left in stock+5Brand NameUnder Armour KidsProduct NameKnockout Tank (Big Kids)ColorWhite/BetaPrice$23.19MSRP: $28.00Rating5Rated 5 stars out of 5(3)