This works for me - I have shoulders that are 3" lower than at the neck, therefore, no bra strap would stay up, even was fitted, and those didn't work. I found that if I stitch a 3" piece of elastic onto each strap, no longer have the problem of my straps falling off my shoulders. I do both straps at the same time, so they are even. Attaching picture of the last bra I stitched the elastic onto.