Sports bras are constructed to support breasts and minimize breast bounce during low, medium and high-impact activities. They do this by either encapsulating each breast or by compressing the breasts against the body. For vigorous activity, some sports bras use both. Breast bounce is not only painful, but it can also damage delicate breast tissue, so a sports bra is recommended for all your workouts and sports. Women who prefer bras without an underwire can find plenty of wireless sports bras. From cotton blends to advanced performance fabrics, these bras are meant to provide maximum range of motion and comfort while supporting and protecting the breasts.You can choose from a variety of styles, including pullover, zip-front, hook-and-eye closures and racerbacks. You'll never have to sacrifice comfort for support with a wire-free sports bra.