These Xero trail shoes fit my feet so soft and snug that on the third day of the hike we woke up with wet shoes, socks and clothes after 24 hours of heavy rain. I took off my socks and put on the new Xeros. At the end of the day - no irritation, no pain, no blisters. My feet feel so good that I can take my shoes off and walk barefoot for miles with ease. I have four pairs of Zero and would highly recommend them! They are a bit small as I'm a size 11.5 and my usual size is 10.5-11. The fit was perfect.