Under Armour Heatgear Victory Dream On Tank - Girls' Grade School The Under Armour HeatGear Victory Tank for girls features a classic rib construction that improves mobility and accelerates dry time. Signature Moisture Transport System wicks sweat and dries quickly. Back mesh insets for extra ventilation to keep you cool. HeatGearŪ works best in weather between 55 and 75 degrees. 94% polyester/6% spandex. Imported.