While out picking up toe warmers, I decided that I'm going to give my trusty sandals a try. Mid-weight hiking socks, heavy "water proof" socks and SPD sandals. If I get a mile down the road and it's not working I can add the toe warmers. My feet have good circulation and they rarely seem to get cold. We'll see. 10 degrees, not counting the windchill will be new ground for me with sandals but I've seen plenty of soaking rain and 40 degree temps for 5 hours while out on tour. Tomorrow is going to be a "dry cold".