I have tried cycling booties before and never really thought they were all that. They really didn't keep my feet as warm as I thought they would. I also bought cheapy ones just to try them out. Maybe that was the reason they sucked. I found that my feet stay warmest when I wear alpaca wool socks over a thin base sock. Surprisingly the best thin base socks are usually old dress socks because they are made mostly out of nylon, polyester or some other synthetic. The key to keeping you feet warm is to have the sweat wicked away so your feet can stay as dry as possible.