2-way cotton/spandex stretch provides uniform support. This style has become a classic in its own life time. Natori Sport interprets classic Polyester Cotton and Lycra into a sport bra with built in comfort features designed to support and anchor. The cups are a 2ply seamless support holds and minimizes irritation. Ourter sling helps support and anchor which 2ply wide bottom band and back anchor this bra in place. Wide comfort straps are brought in close in back to hold and avoid slipping. Machine washable. Imported.