I had a pair of these I had never worn, I dont know when or why I bought them, but it was a couple years back. They looked kinda crappy, I must have bought them just to kick around in. So a few weeks back, all my boots were wet on Saturday morn, had to get wood, and shovel, so I threw them on. After about an hour, I realized, hmmm my feet are not cold or wet! Then I looked and they were Polaris, with thermo lite. Warmest most comfy boots I have ever had. I dont know how well they will hold up doing what we do to them, but at 35 bucks a pair, I will just buy a few more. 1 pair of good socks, good to go, at -20 wind chills warm