Have your hiking boots broken down such that the soles are separating from the upper part of the boot?
This is likely the result of polyurethane hydrolysis where exposure to water and humid air breaks down the midsole of your hiking boots.
This video talks about:
-The problem of polyurethane hydrolysis
-How to fix hiking boots when this happens
-The environmental benefit of fixing boots compared to buying new
-The economic benefits of fixing hiking boots compare to buying new
The webpages referenced in this video are as follows (in order of appearance):
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