My feet get cold even when I'm wearing purpose-built winter cycling boots. It's an issue, I know, for many riders. Some of us get cold hands, others cold feet. Blood simply does not flow as well to the extremities in cold weather, as our bodies are designed to, in effect, pull blood toward our core to help maintain our core temperature. Thus, the hands and feet suffer – and need extra help staying warm. This year I upgraded to Alpaca socks.