Having wide feet and one foot almost half a size smaller than the other, I often find my smaller foot fits loosely in the shoe. I have tried layering moleskin, which used to work nicely until the quality of moleskin in the past few years has declined. The newer (even name brand) moleskin barely adheres to a new shoe and appears to be about 1/4 the thickness of previous offerings. In searching the interwebs for useful information, I came across the Pedag brand several times. A German brand, I assumed that counted for something, since they generally export decent stuff, so I ordered a pack of these for my various (including bicycle) shoes. The instructions are straightforward, as one would expect, although installation not easy for my cumbersome fingers into the tight heel. The adhesive is strong, sticking well on contact. The adhesive is not designed for removal and reapplication, but I was able to move the first one around and reapply to satisfy my OCD. Latter attempts were better, and I learned to just let it go, and not attempt reapplication. I expected the first one to not stay attached after some wear, and it did start to peel at the edges. After several days it is still attached, but peeled at the edges. Unfortunately, the other single applications are also peeling at the edges. What I did find useful was to peel back the edges on these and apply some hot melt glue (using a Dewalt hot glue gun), which seems to be working much better than the adhesive. Just peel it back and inject some glue, and quickly compress in place. Of course it is hot and you will burn yourself, but It is only momentary. I will try next time with gloves and maybe wax paper? As for helping my annoying smaller foot, they grips do seem to work. Not perfectly, of course, as my foot is still a bit loose, but much better than before. I suppose a cobbler would be the next, better option, and I may look into that. Save for the adhesive issue, these are recommended and get four stars!