Under Armour Kids - Grade School Flash (Big Kid). Color Castlerock/Steel/Phoenix Fire. Low Stock. On sale for $39.83. MSRP $50.00.. 4.7 out of 5 stars10 left in stockBrand NameUnder Armour KidsProduct NameGrade School Flash (Big Kid)ColorCastlerock/Steel/Phoenix FirePrice$39.83MSRP: $50.00