Under Armour Kids - Grade School Infinity 3.0 (Big Kid). Color Black/Black/White. On sale for $48.75. MSRP $65.00.. Add to favorites. 0 people have favorited this+4Brand NameUnder Armour KidsProduct NameGrade School Infinity 3.0 (Big Kid)ColorBlack/Black/WhitePrice$48.75MSRP: $65.00Rating