Under Armour Kids - Under Armour Kids Performance Tech Prints 3-Pack Boxer Briefs (Big Kids). Color Black. On sale for $16.80. MSRP $28.00.. 4.9 out of 5 starsAdd to favorites. 0 people have favorited thisBrand NameUnder Armour KidsProduct NameUnder Armour Kids Performance Tech Prints 3-Pack Boxer Briefs (Big Kids)ColorBlackPrice$16.80MSRP: $28.00Rating5Rated 5 stars out of 5(12)