The variety is endless when it comes to cotton sports bras. There are so many colors, that you will find one or two to go with every outfit that you want to match it up with. Black and white are the predominant colors and combinations of those two, but there are pink, and green also.
Some are reversible, the compression sports bra type, which you slip over your head, and others with full cups, to fit almost any size of bust. A front opening might be the cotton sports bra of your choice, or one with extra padding to absorb the shock of extreme physical exertion. Your breast tissue needs to be protected while you are doing your hard aerobics, so the breast will not stretch.
The underwire sports bras are very attractive and could be worn with or without clothing over them. This bra will help to keep your breasts secure while running or any other challenging sport activity. If your sports bra, on a day to day basis is of the underwire type, this might be a good choice for you, as you are already familiar with them. These bras are for the woman who does not prefer the compression type of bra, but still wants the definition and shape of her body to show.
If a softer version is for you, then there is a sports bra made of cotton, which is reversible and has a wonderful feel to it, as it is cushioned with extra padding and is so soft against your skin. It still has the support you need, but maybe not for the more difficult sports, which require a lot of jumping.
Your choice could still be the typical back closure of sports bra, so there is a cotton sports bra made just for you. The wicking or mesh lets your skin breathe, so none of the accumulation of perspiration happens.