A lot of people don't know how to properly fit their boots for keeping toes warm. Your feet need enough room for air to circulate, meaning the heated air off your body. But also, you don't need to sweat either. Get your hunting boots in a size bigger than you need. Get a pair of socks that are either silk or a silk/poly blend. Put these on first then a good warm sock. If your feet should sweat, the silk wicks moisture away from your foot and into the sock and boot. Again, when you put your boots on there should be sufficient room in them for warm air circulation. I do the above and wear the 800 gr boots and never have an issue with cold feet. Tight boots mean cold feet.
