I have been a Kenetrek fan since I could afford my first pair back in 2011. That pair lasted me 6 years and I still wear them today even though they are severely worn down. Since that first pair my wife and I both only use Kenetrek boots. Now that I have the heavy insulation boots I find myself wearing these boots anytime I am out in colder conditions. I have pushed them honestly further than I should have as far as temps are concerned and although my feet did get slightly cold in the negative temperature range they still performed just fine.