It works. My business bag, which I carry over my left shoulder every day, and sometimes a small suitcase or travel bag, always slipped off when I had more than a few kilos of things with me. I carry newspapers, magazines, soda, medication, insulin in an insulated beverage container, cell phone, charger, maybe books and an umbrella, and more. It's usually 10-12 pounds and up for the case and contents. None of the shoulder straps that came with these cases and bags, or the third party ones I bought, prevented them from slipping off my shoulder. I could walk two or three blocks and would have to stop to put my bag back on my shoulder. None of these shoulder straps ever had anything other than narrow strips of rubber or rubber pads that were minimally non-slip. I received my order for a pack of four Large Strap Gummy Pads about two weeks ago. Attaching two pads to the bottom of the shoulder strap solved the problem of the business bag slipping off the shoulder. The suitcase now hugs my shoulder and stays in place no matter how much I put in it or how long I walk around with it. No more stopping and climbing on the shoulder strap. I have yet to wear the Strap Gummy over the straps of other bags I carry on my shoulder but I expect the results to be the same. The glue that the Strap Gummy attaches to the shoulder strap seems pretty strong. We'll see over the next few months how well the Strap Gummy holds onto the shoulder strap and if anything wears out from abrasion.
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