Under armour heatgear core t shirt mens this under armour heatgear core t shirt is crafted with the superior headgear technology which assists in keeping you cool and dry whilst wearing designed with short sleeves and a round neck as well as flat lock seams to provide a comfortable feel that does not irritate the skin or chafe it under armour branding completes the look baselayer flat lock seams heatgear round neck short sleeves stitched detail under armour brandin