Second pair of Keens, first was the Flint. I bought these for a winter boot and they are now my only boot to wear. I am on concrete and gravel 8-12 hours a day and my feet and knees do not hurt. The only thing I would change is to put a loop on the back to be able to get a finger in, the leather strap is a joke. This is the best pair of boots I have ever owned. I have worn them for 6 months without any issues.