We know what you're thinking, what is heat gear by Under Armour? The Kids Under Armour Heat Gear Shorts are designed with Heat Gear fabric technology that wicks sweat away from the skin, pulling it to the surface to speed up the evaporation process. This keeps your body cool, dry and light so that you can keep working hard. The shorts feature an elasticated waistband and flat lock seams that combine for a comfortable fit and limited irritation against the skin, finished with Under Armour branding. -Kids sizes