Under Armour Kids - Grade School Flash (Big Kid). Color Castlerock/Steel/Phoenix Fire. Low Stock. On sale for $45.00. MSRP $50.00.. 4.7 out of 5 stars10 left in stock+2Brand NameUnder Armour KidsProduct NameGrade School Flash (Big Kid)ColorCastlerock/Steel/Phoenix FirePrice$45.00MSRP: $50.00Rating5Rated 5 stars out of 5(10)