Under Armour Heatgear Coreshort Prima - Men'sPower through your workout in the UA 9" Heatgear Core Short Lite. The unique patented design supports the core anatomy and the angled stretch fabric enhances functional movements. HeatGearŪ technology offers moisture-wicking comfort to keep you cool. 9" inseam. 84% polyester/16% spandex. Imported.