You need a bra that breathes with you.The Nike Swoosh UltraBreathe Sports Bra's mesh fabric feels weightless and encourages airflow, keeping you cool and dry. Don't let heat or sweat ruin your next workout. Take a breather. Mesh fabric uses Dri-FIT technology to wick away sweat, keeping you cool. Racerback design encourages freedom of movement. Tight, snug fit provides support for medium-impact activities like spin class and running. 78% Polyester. 22% Spandex. Imported.