Stonewear Designs Dryflex Slim Tank: Easy care fabric and great fit make the Stonewear Dryflex Slim tank a favorite. The quick-dry Dryflex fabric makes the Slim tank a terrific workout, travel or around town piece. Stonewear Designs Dryflex Slim Tank Features: Fits perfectly over your own bra Quick-dry fabric Four-way stretch moves with you Machine wash, hang dry Materials: Dryflex (90% polyester, 10% Lycra Spandex) Materials (Iris Color Only): 90% Cotton, 10% Lycra Spandex