Granted last was 10yrs ago, but. N. WI , below zero starts to day up in a tree stand. As others said, i chose warm but not bulky winter boots as hiked a fair ways and like to mix in some still hunting. Gave up on changing into dry socks though don’t deny it helped - was too much a dance in the dark before getting in the tree, and no fun once in the tree either. Added insulated boot covers when on stand, and like Teal said, loosen the laces some. Did carpet on stand for a while to get off the metal heat-conductive surface. Could still get cold, but taken together was an improvement.