What is a Convertible Bra?  

A convertible bra has detachable straps that can be placed in different configurations to work under different necklines. A fully convertible bra has straps that can be removed entirely. It can be worn as a strapless, a conventional strap style, a crossback, off the shoulder, one shoulder, and possibly halter style with just a few strap adjustments. Bras where straps are sewn to the tops of the cups but detach in back are considered convertible. And, bras with a "j-hook" style attachment on the back straps is classified as a convertible bra as well.