StrapTrap is a sew in bra strap holder, sometimes called a bra strap retainer, clip or concealer which was designed to prevent to age old problem of bra straps falling off the shoulder or peeking out from under clothes.
Slipping bra straps is a perennial problem the world over. Some market research showed that 85% of women said a slipping bra strap was a problem and 90% thought it ruined the look of an outfit.
StrapTrap works attaching the lingerie strap to the garment. In this way the garment and straps stay aligned all day.
StrapTrap also prevents a garment falling off the shoulder, for example wide boat necks, and are especially useful for dance, theatrical and historical costumes.