This ingenious little device effortlessly turns any bra into a racerback. It's as simply fabulous as that. Just slip your bra straps on either side of the Strapper and voila! Unlike a standard racerback bra, you can also adjust where the strapper sits on your back for different silhouettes (more like a halter? move the Strapper right up under your neck). Also keeps loose straps from falling off shoulders. This three pack includes one each of White, Black, and Tan for all of your different outfits. Sometimes it's the simplest solutions.