If you need just a tiny bit more warmth than tights, I have to say that panty hose work pretty well. I actually put them OVER my biking shorts, then put on my biking tights, which are normally warm enough on their own, but not if it's much below 20 F, or there's really bad wind chill. As long as you've got the bike shorts next to your skin, then you really don't have to worry about the seam of the p.hose. They also add one more thin layer to what's on your feet without taking up much extra room in the shoes. I put them on OVER my wool socks, tho'. More comfortable that way. Looks totally dorky!! Panyhose over bike shorts and socks! You don't want a visual! But if it keeps me warm, I don't care. I'm sure there are more high tech solutions, but this works, its cheap, and you don't even have to worry about runs in the hose. Who's gonna see 'em?
annie
I use the same method for x-country skiing, or hiking, when the temps are really cold.
Time is a companion that goes with us on a journey. It reminds us to cherish each moment, because it will never come again. What we leave behind is not as important as how we have lived." Captain Jean Luc Picard