strapless bra is a type of brassiere designed without shoulder straps, allowing it to be worn under clothing with bare shoulders or unconventional necklines. It provides support through underwire or other structural elements, relying on a snug fit around the torso to stay in place. Ideal for outfits like strapless dresses or tops, the strapless bra ensures a discreet and secure fit while offering necessary support for the bust.