Under armour heatgear core long sleeve baselayer mens this under armour heatgear core long sleeve baselayer is crafted with long sleeves and a round neck and displays flat lock seams to offer you great comfort that does not irritate or chafe heatgear technology assists in keeping you cool and dry by drawing sweat away from the body under armour branding completes the look baselayer round neck long sleeves flatlock seams heatgear technology under armour branding 84