I should add that these are to be worn commuting to work in Philadelphia. The Winter temperature in Philly averages about 35-40F, with a low of about 0-10 F, which is rare. Last year, I wore uninsulated LL Bean rubber boots with very little discomfort. My worst case would be a massive failure of infrastructure in which I would have to walk about 30 miles home.

On the downside, I'm not as tough as Pappa.