I bought a slate coloured pair in November, on sale, to use this summer on a trip to Paris and London. I wanted a good light hiker/runner for the days walking the pavement and with the Vibram sole and waterproofing these sounded like they would fit the bill. I wore them around the city I lived in and they were very comfortable, although slightly small in length. So I bought another pair (fossil colour) to use at work - a fly in /fly out project. But this second pair now makes crinkly sounds when I flex my toes, on both left and right feet. I don't know why, maybe the inner membrane is not very good. I have two pairs now, I don't know if my other pair has the same problem, I will find out on my trip.