Bras are worn right up against the skin, often absorbing sweat or picking up dead skin throughout the day. While it might seem like a bra should be washed after each use, that's not always the case.

Several years ago, I had a lucky sports bra, Tracksmith’s Allston Bra, that I’d wear specifically for racing because it provided comfort for hours and didn’t cause my boobs to ache. Sadly, the seams ...