I recently bought new bras that fit perfectly and were comfortable in every way except for the straps which were made of a mesh material. The straps irritated the skin on my shoulders terribly and even hurt. I wear racing bras so I don't have a problem with the straps slipping, but they will definitely keep them in place if I have this problem as they stay in place and don't move. These harness pads are soft and comfortable and I even forget I'm using them. My belts no longer cause me pain or discomfort.