Under Armour Kids - Boxer Brief Underwear (Big Kid). Color Tech Blue. On sale for $24.64. MSRP $28.00.. 5.0 out of 5 stars+3Brand NameUnder Armour KidsProduct NameBoxer Brief Underwear (Big Kid)ColorTech BluePrice$24.64MSRP: $28.00Rating5Rated 5 stars out of 5(5)