If you have cold boots in the winter after walking some distance, then sitting for a 1/2 to 1 hour, give these a try.
Not only will your feet be warm, the boots will to.
http://www.gostwear.com/baffin-cush-...SABEgL9hPD_BwE
I have the old school version of these in canvas camo siding with rudder buttons. There the best.
PS: Order them extra large so they can pull over the hunting boots.
Mine are size 15
Don