Crush sports and training in the Under Armour Girls' Knockout Tank. Made from 90% polyester and 10% elastane, the fabric couldn't get any softer or more breathable. Moisture-wicking and odor-resistant technologies keep you comfortable, while the T-back design delivers airflow, and the shaped hem keeps you covered while you move. Wordmark taping adds detail and contrast for sporty style. Under Armour Girls' Knockout Tank Black/White, X-Small - Girl's Athletic Tops at Academy Sports