The Magic Clip is made of a soft plastic, and can be used to pull your bra straps together in the middle. This creates a racerback on either the front or on the back side of the bra. There are four pieces in each pack; two colors and two sizes. Soft plastic clips to pull bra straps together, Creating a racerback effect Prevents bra straps from sliding Can also be used at the front of a bra Contains four pieces in two sizes and two colors