The invention relates to a backless and optionally strapless brassiere comprising two textile layers, as well as chest underwiring and cup reinforcements. The torso underwiring comprises a substantially horizontal main bottom portion which is coupled, at the sides of the torso, to two substantially horizontal top side portions. Each reinforcement is a thin plate of rigid material including extensions extending from a side region arranged substantially outside each cup and engaging with the top side portion of the underwiring.

A backless support bra having a front main portion with first and second upper shoulder straps and first and second lower pelvic straps, which are designed to pass through the pelvic region of a wearer, securing the bra in place and providing support to the wearer without exposing bra wings in the back region of the wearer. Various methods of securing the backless support bra are also provided.