Under Armour Kids - Knockout Tank (Big Kids). Color Black. Low Stock. On sale for $24.45. MSRP $28.00.. 4.8 out of 5 starsAdd to favorites. 0 people have favorited thisLow Stock+2Brand NameUnder Armour KidsProduct NameKnockout Tank (Big Kids)ColorBlackPrice$24.45MSRP: $28.00Rating5Rated 5 stars out of 5(5)