I have a similar problem with cold feet, mainly because my feet sweat and then freeze when I stop moving. You need a pair of polypropylene wicking socks. Wool or some other material socks that don't hold moisture and are breathable. I recently started wearing lighter weight boots when walking and boot blankets when I get to my spot. Also, handwarmers in the boot and one of those thermacare heat wraps on your lower back and kidneys helps keep your body from restricting blood flow to the extremities, giving you cold feet and fingers. Keep your core warm and dress in layers. If you sweat, you freeze.