I have been bowhunting for 30 years and the only thing I have found to keep my toes from freezing when it is cold is foot warmers. You can buy them at any Walmart, put them in your boots before you go hunting and they will keep your feet warm for up to 6 hours. You can get the Toasty toes brand or just the regular Foot Warmers brand. Use them and throw them away. I stay alot warmer totally with my feet warm and comfortable!They have worked great for me!