Whatever, the shoe is exactly like a glove for feet (you have to be very careful when choosing your size). I don't have any problem and even no blisters :p
But when starting to run with such shoes, you have to be prudent : start to run only 10-15 minutes, not more, because it could be very painful (muscles work completely differently). By the way, as our feet are always captive in shoes and socks, they are now very sensitive. So, the first times, walking and running on rocks is not very comfortable. But the more you will run, the stronger your feet will be
