I don?t know why Adidas changed the design but the newer version is vastly inferior to the previous product. I can?t believe this charger is less than half the cost of the ?recommended? charger but this works better and is less than half the size! Rather than getting a new pair of headphones, or literally anything else. 3Efficiency. I returned it and ordered another pad that is also advertised to fit both standard and Olympic bars. I just got these today but already in love ! I was simply struggling to have the things stay put within minutes of use. At my house we were keeping our spices up in the cupboard, and I would get frustrated because at 52" I had to blindly reach around and pull them out one-by-one to find what I was looking for. Thank you for having me put multiple holes in my walls just to fall right off! love these!