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,
Shelf stereo receivers were not stereophonic receivers. In terms of amplifier power, many shelf stereo systems have a total system power greater than 500 watts, which is considerably more than many surround sound receivers, which are usually higher in price. Most shelf stereos use either the standard two channel format or the 2.1 channel format (which includes a subwoofer), with the latter being more common in the higher powered systems. The "point one" indicates the use of a subwoofer along with the two main speakers. However, this is the main difference between shelf stereos and surround sound receivers. Surround sound receivers most