Under Armour - Knockout Tank. Color Viral Blue/Black. On sale for $30.69. MSRP $35.00.. 4.6 out of 5 starsAdd to favorites. 0 people have favorited this+6Brand NameUnder ArmourProduct NameKnockout TankGenderWomen'sColorViral Blue/BlackPrice$30.69MSRP: $35.00Rating5Rated 5 stars out of 5(21)