Under Armour Kids - Grade School Infinity 3.0 (Big Kid). Color Black/Vivid Magenta/Morph Green. On sale for $57.85. MSRP $65.00.. Brand NameUnder Armour KidsProduct NameGrade School Infinity 3.0 (Big Kid)ColorBlack/Vivid Magenta/Morph GreenPrice$57.85MSRP: $65.00