Under Armour Knockout Tank Top Women's. This is one of the lightest, most breathable shirts we make—and your new go-to for any sport, training, or activity. It features insanely soft, breathable fabric and a 4-way stretch construction that moves better in every direction. The material wicks sweat and dries really fast, keeping you comfortable. Design details include T-back straps with wordmark taping and a dropped, shaped hem for enhanced coverage. This ladies gym top is made of super-soft, breathable fabric with 4-way stretch for freedom of movement. It is designed to wick sweat from the skin, drying quickly and maintaining comfort. The women's tank top is crafted using odour control technology which minimises any unpleasant smells, maintaining freshness. Loose fit. BODY: 90% Polyester, 10% Elastane.