Originally Posted by
Cosmoline
For temps much below 25f I go with more insulation in the boot, not more sock on the foot. If your boot is good enough you shouldn't need more than a thin liner for a sock.
+1 I've had both Diadora and Garnae "winter" boots (waterproof). Both were sort of double lined. Neither fared well below even 35F even with a Showers Pass outer bootie. Heard the Old fashioned "TOTEs waterproof boot over the top of the winter biking boot... works well for blockng wind. Has anyone had good success with temps below 32F?