Bra allows the wearer to use the tighter hooks as the bra stretches during its lifetime. Bras may be designed to enhance a woman's breast size, or to create cleavage, or for other aesthetic, fashion or more practical considerations. Nursing bras are designed to aid breast-feeding. Compression bras, such as sports bras, push against and minimize breast movement, whereas encapsulation bras have cups for support. Breast support may be built into some swimsuits, camisoles and dresses. Bras come in a variety of styles, including backless, balconette, convertible, shelf, full cup, demi-cup, minimizing, padded, plunge, posture, push-up, racerback, sheer, strapless, T-shirt, underwire,
Bandeau O-rings, and the twisted top are popular design elements. In modern sports and swimwear, a bandeau is a strapless garment worn around a woman's breasts. It may be fastened in the front or back or be sufficiently elastic so as not to need a fastener at all. A bandeau may come with a detachable halter strap, for extra support. A strapless bandeau, or tube top, was also worn as casual wear and sports wear starting in the 1970s, and is sometimes worn as part of a sportswear ensemble. Actress Halle Berry wore a bandeau with matching pants to the MTV