This warm yet lightweight Longsleeve T from Under Armour® is made with compression, HeatGear® fabric that is custom designed to keep you cool, dry, and light while helping to increase your circulation during those outdoor workouts. Updated ergonomic compression fit. Superior moisture transport. Evaporative cooling. UPF 30+. Anti-odor technology. - Prevents growth of odor-causing microbes. HeatGear® fabric. - Keeps athletes cool, dry and light. 82% Polyester / 18% Elastane. Imported.