t sounds like you're referring to a bra with a "butterfly" design, which typically features decorative elements that resemble butterfly wings or a butterfly motif. When paired with "underwear," it could mean you're looking for a matching set that includes both a bra and panties, often designed to complement each other in terms of style and theme.
Butterfly bras can come in various styles, including:
Lace Butterfly Bras: Often featuring intricate lace detailing that forms a butterfly pattern or accent.