Under Armour Kids - Grade School Surge 4 (Big Kid). Color Mod Gray/Castlerock/Phoenix Fire. Low Stock. On sale for $44.55. MSRP $55.00.. 4.9 out of 5 starsAdd to favorites. 0 people have favorited this6 left in stock+5Brand NameUnder Armour KidsProduct NameGrade School Surge 4 (Big Kid)ColorMod Gray/Castlerock/Phoenix FirePrice$44.55MSRP: $55.00Rating5Rated 5 stars out of 5(16)