By this, the straps on the shoulder or the neck are avoided. Slipping of the bras are the common problem faced in this type of bra. Wonderbra as done an extensive research on this and has come out with a Strapless Bra which won't slip from its place. They use Spandex material below the bust area to give the great support, which are hitherto given by the straps on the shoulder or the neck.