* These slide around in the boot.
* The surface material increases sweating.
* The surface material comes away from foam.
The foam, when exposed, did not disintegrate.
Bought these for a pair of Karrimor walking trainers (not wide boots or trail shoes). I have narrow feet but these are way too narrow for the shoes and my feet. I cut them very carefully but when placed in the shoes they move around and end up coming out at the heel whilst walking. These, for me were a complete and utter waste of money. I would like to see a pair of "hiking" shoes they would actually fit. They fit my dress shoes perfectly which confirms they are not fit for purpose in being described as hiking soles.