Under Armour Kids - Grade School Surge 4 (Big Kid). Color Mod Gray/Castlerock/Phoenix Fire. $55.00. 4.9 out of 5 stars+4Brand NameUnder Armour KidsProduct NameGrade School Surge 4 (Big Kid)ColorMod Gray/Castlerock/Phoenix FirePrice$55.00Rating5Rated 5 stars out of 5(15)