My commute is six miles each way. In that distance, my feet stay warm enough no matter how cold it is (my fingers are another story). If I ride longer, as I do on the weekends, my toes freeze despite wool socks, shoe covers, etc. I am convinced that short of chemical warmers, as mentioned in earlier posts, there is nothing that I can do to keep my toes warm. Question- what chemical warmers are good for feet and where do you get them?