As you can see, it's just a simple snap with cords running between the two halves. You sew the stud side into the shoulder seam of your favorite shirt, tank top, sundress, or whatever, then you can wrap the cords around your bra and/or camisole straps and snap to keep them from wandering in a different direction. Voila! No more frustration with sports bras that ride up toward your neck and peek at everybody, or slippery little straps that want to slide off your shoulder and take a nap on your arm. | 
