Under Armour Kids - HeatGear® Armour Long Sleeve (Big Kids). Color Steel/Black. Low Stock. On sale for $29.44. MSRP $32.00.. 4.7 out of 5 stars4 left in stock+4Brand NameUnder Armour KidsProduct NameHeatGear® Armour Long Sleeve (Big Kids)ColorSteel/BlackPrice$29.44MSRP: $32.00Rating5Rated 5 stars out of 5(17)