Under Armour Kids - Knockout Tank (Big Kids). Color Black. Low Stock. On sale for $21.95. MSRP $28.00.. 4.8 out of 5 starsAdd to favorites. 0 people have favorited this9 left in stockBrand NameUnder Armour KidsProduct NameKnockout Tank (Big Kids)ColorBlackPrice$21.95MSRP: $28.00Rating5Rated 5 stars out of 5(5)