Regardless of their design, the cups of a bra are held in place by the band. Indeed, in a properly fitting bra, it is the band that provides the majority of the support, distributing the weight of the breasts around its circumference. The band must be snug enough to anchor itself to the body without slipping, which would greatly reduce the amount of support that it could provide and thus place undue demand on the straps. At the same time, the band must not be so tight as to be uncomfortable, cause skin irritation or restrict circulation. To avoid such problems, the wings of the band are elastic, and the clasps of most bras can be fastened in several different positions to allow the tightness to be adjusted.
At the front, a full band or full frame bra has a band that continues below the bottom of the cups. The front of the band, or frame, may be a single piece of fabric, or it may consist of a central gore and two side pieces. Full band bras generally have a seam on each side that joins the front of the band to the back. This seam may be boned to provide additional support and structure, helping to stop the band from rolling up. Conversely, a partial band or frameless bra has a shorter gore that is not attached to the sides of the band, but only to the cups. In a partial band bra, the back of the band often attaches directly to the outer edges of the cups, with such bras usually relying on underwires to make up for the missing support. The shorter gore looks less substantial, placing more emphasis visually on the cups, and is also better suited to a front closure. The two bras previously illustrated in Figure 3.1 demonstrate the difference between full and partial band designs.
Because of the greater structure at the front of the band, especially in an underwired bra, the back of the band is usually made of a material that has more stretch than the front. It may take one of several forms, as illustrated in Figure 5.1:

straight back
A straight back bra, also known as a square back or camisole bra, has a band that runs horizontally across the back, with the straps joining it at right angles. This simple design often accompanies a partial band on less substantial bras, and may be used for reasons of economy. It is also often used in strapless or convertible bras, as it keeps its shape without any straps.
U-back
A U-back bra, also known as a ballet back or leotard bra, has a band that curves down at the back, sometimes with the straps forming part of it. Such bras tend to have deeper wings, and thus provide more support for larger busts. This design places the straps more centrally, as well as at a slight angle, which can be better for women with round or sloping shoulders.
racerback
A racerback bra, also known as a T-back bra or wrestler back bra, has a band that curves up at the back, positioning the straps higher and closer together, or alternatively criss-crosses them, so as to angle them similarly. Sports bras often employ this design, because it allows the arms a wider range of movement as a result of the straps not going over the shoulder blades, and also stops the straps slipping or becoming visible beneath a sleeveless top. A racerback design can help distribute the weight of the breasts more evenly, offering greater comfort thanks to reducing strain on the back and shoulders.
As the name suggests, a strapless bra lacks straps, and thus relies even more on the band to provide support. Such bras tend to have wider bands made of firmer fabric, perhaps with side boning, and often feature a silicone grip strip along the inner edges, which clings to the skin so as to reduce the risk of slippage still further. Strapless bras may have cups that are designed with additional support in mind. They allow women to wear similarly strapless clothing, such as off-the-shoulder dresses, as well as garments with narrow straps, like tank tops, without worrying about bra straps showing.
A bra that has a band that extends beyond the bottom of the bust is known as a longline bra. A shorter longline bra may reach the midriff, whereas a longer one may go all the way down to the waist, albeit with the bottom of the band still being horizontal. Thanks to holding more of the torso, the longer band provides more support, reducing the demand placed on other parts of the bra. That makes this style particularly suitable for larger busted women, as well as allowing these bras to have non-wired cups. In addition to offering a greater feeling of security, longline bras also have a shaping effect, creating a smoother silhouette that minimises bulges.
The band of a pull-on bra is elastic enough to allow it to be pulled over the head, although this comes at the cost of such bras being less supportive. Generally, however, bands are fastened with a clasp. If the clasp is at the back, it is usually adjustable, accommodating both natural fluctuations in size and also the tendency of elastic to stretch over time. Bras with bigger cups often have longer bands in order to provide more support, and consequently their clasps have more hooks.
A bra extender may be used to broaden the band of a bra by adding an second set of hooks which attach to the eyes of the bra, plus additional sets of eyes which attach to the hooks of the bra. These must be matched both in number and the distance between them. Another accessory, a low back bra converter, may be used to pull the centre of the band downwards, thus concealing it beneath a scoop back dress, although the resulting distortion can affect the amount of support that a bra provides.
A bra strap may be made of a single piece of elastic, looped through a ring at either the apex of the cup, or more commonly, the back of the band, with one end attached to the other of those locations and the second sewn around the slider. Such straps are said to be fully adjustable, because the slider can be moved along their entire length. Alternatively, a strap may consist of two separate parts, either connected by a ring or sewn together, in which case the strap is said to be partially adjustable. Partially adjustable straps allow for a front section that is decorative, or one that is wider than the back or tapers for reasons of comfort, but their more limited scope for adjustment makes them less suitable for taller or shorter women. In both styles of strap, the rings allow the angle of the strap to accommodate different shoulder slopes, and also to follow movement. Even in a fully adjustable strap, the sliders are generally positioned on the back, thus avoiding possible discomfort from them pressing on the collarbones or the very top of the shoulders, as well as making clothes appear smoother at the front.
Bra straps that are positioned closer to the neck are referred to as centre pull straps. Those that are attached nearer the sides of the body are said to be wide-set. These should not be confused with straps that are wider, i.e. have broader elastic, which may be found on larger cup bras to reduce the extent to which they dig in. As discussed previously, the style of a bra's cups affects the position of its straps, with full cup designs having centre pull straps, and balconette bras having wide-set ones. In a high apex bra, the cups taper towards the straps, meaning that the latter start closer to the shoulders vertically. Regardless of position, however, the elastic used for bra straps often has a plush back, being softer on the side that goes against the skin, again with the aim of cushioning the load on the shoulders.
A convertible bra, also known as a multiway bra, has straps which attach to the band by means of G-hooks, also known as swan hooks, which are so called because of their shape. As well as allowing the bra to be worn either strapless or with only a single strap, this permits the straps to be criss-crossed or worn in a halterneck arrangement, thus accommodating various styles of outerwear. The straps of a convertible bra are often longer as a result. Discreet tabs are sewn into the cups and band of such a bra for the straps to attach to. Some convertible bras have more than one set of these tabs, increasing the number of possible strap configurations. Others come with clear bra straps, made of a stretchy, transparent plastic that is less conspicuous than regular elastic, but convertible bras can also be worn with interchangeable decorative bra straps to draw more attention to the shoulders.
The straps of a convertible bra can be fastened in a criss-cross arrangement, either to keep them from showing under clothing, or to stop them slipping. A J-hook bra has non-detachable straps, each having an additional slider with a hook that allows them to be clipped together. Although the straps do not cross, they are nevertheless pulled in at the back, like a racerback, yielding similar benefits. There are also separate bra strap clips that achieve the same effect, which can be used with any bra that has long enough straps.
Women who have trouble with their bra straps sliding off can also avail themselves of bra strap cushions, which are small pads designed to sit between the strap and the top of the shoulder. The soft, cushioned material of these accessories also helps keep the elastic from digging into the skin, making the straps more comfortable.
Why do some bras have a full band, but others have a partial one?
Is it better for a bra to have fully or partially adjustable straps?
What are the different ways that a convertible bra can be worn, and why?
Find bras that have each of the band and strap styles considered in this lesson, and discuss them.
Considering a selection of bras, describe the band and straps of each in detail.
Hapless Harry knows his wife will be wearing an off-the-shoulder dress to a dinner party, and so he puts out one of her strapless bras to save her the trouble of looking for it. Why might she still search for another bra?