This Under Armour HeatGear Cool long-sleeve base layer delivers high-performance moisture-wicking and temperature regulation for active wear. Featuring a sleek black design with signature silver reflective seam detailing along shoulders, sleeves, and side panels for enhanced visibility and modern aesthetic. The iconic white UA logo is centered on the chest, while the ribbed crew neck includes a gray inner tag with 'ARMOUR' branding. Constructed from lightweight, stretchable synthetic fabric (likely polyester/spandex blend), it offers a snug, second-skin fit ideal for layering or standalone wear during workouts, training, or outdoor activities. The flatlock seams reduce chafing, and the raglan sleeve construction ensures unrestricted mobility. Tag indicates 'HeatGear Cool' technology—designed to keep you cool and dry by pulling sweat away from the skin and evaporating it quickly. Perfect for gym sessions, running, sports practice, or as a thermal underlayer in cooler conditions. Durable, breathable, and engineered for performance without bulk.