Hello, Like the previous two commentators, I am delighted by these socks. Naturally, you can find more hot, although I find warmer than my winter socks x bike yet planned for the winter. I do not know if all channels ventilation systems are accurate, but in use, do not sweat it, it sits well in the calves (not very high so not easy for the town to hold sock) without compressing it. Multiple reinforcements in areas of friction, therefore no pain for me in contact with the shoe. I recommend "warmly"