Sat here at work and my feet are freezing. I have reynaulds so circulation is poor and i go numb and blue if cold. I bought sheepskin / wool insoles but although they have made a bit of a difference my feet are still basically numb. I got some Uggs, they are genuine ones and even they don't make my feet warm. I've had a whole winter of chilly feet. Are there ANY brands that will keep my feet warm? I would wear hiking boots or anything at this stage.