Under Armour Kids - Knockout Tank (Big Kids). Color Varsity Blue/Water. Low Stock. On sale for $23.59. MSRP $28.00.. 4.8 out of 5 starsAdd to favorites. 0 people have favorited this1 left in stock+3Brand NameUnder Armour KidsProduct NameKnockout Tank (Big Kids)ColorVarsity Blue/WaterPrice$23.59MSRP: $28.00Rating5Rated 5 stars out of 5(4)