GO2BRAS Secret Smoother Padded Underwire 1434100 Body: 80% Nylon 20% Spandex, Lining: 100% Polyester Seamless molded thin foam cups that shape and support Wire channeling from Fortitube by Stretchline with no wire poke thru technology for all-day comfortable support, durability, and a smooth look under clothes Wider leotard style back minimizes back fat, provides additional support and ensures straps don't slip Underarm smoothing support panel takes care of the underarm bulges