Under Armour Tech Tank - Men's The Under Armour Tech Tank is the perfect workout tank with its ability to wick moisture from your body and keep you smelling fresh. Its superior moisture transport and enhanced dry times help keep you cool and comfortable throughout your workout and long after. The anti-odor technology helps keep you smelling fresh even after your toughest workouts. HeatGear is best for weather between 75 degrees and 100 degrees. 100% polyester. Imported.