Under Armour Knockout Tank Top Women's. This is one of the lightest, most breathable shirts Under Armour makes, and it's a new go-to for any sport, any training, any time. It features an insanely soft, breathable fabric with 4-way stretch construction that moves better in every direction. The material wicks sweat & dries really fast. It has T-back straps with wordmark taping details and a dropped, shaped hem for enhanced coverage. This sleeveless, round neck tank top from Under Armour is perfect for any active lifestyle. Made with a plain design and brand logo print, this Tech Knockout Tank Top is both stylish and functional. The sleeveless design provides comfort and breathability, while the round neckline adds a classic touch. Whether you're hitting the gym or running errands, this tank top will keep you looking and feeling great. Machine washable. Outer: 90% Polyester, 10% Elastane. Insanely soft, breathable fabric|4-way stretch material moves better in every direction|Material wicks sweat & dries really fast|Classic racerback design with wordmark taping details|Odor control technology minimizes odor - Style #: 1389851|90% Polyester/10% Elastane|Imported