The Itasca men's Ontario winter boot incorporates Thermolite insulation to keep your feet warm at temperatures as low as -20° F. It's constructed with a leather upper, waterproof rubber outsole, and removable comfort insole.
If I didn't accidently throw away the receipt I would return them. They are very uncomfortable. My son got sore feet from them and will probably never wear them again.
These boots looked just like what I was looking for until they arrived. They are so bulky around the ankle and top of the foot. I guess they would be good for someone with a very stocky foot. Had to return them. Unfortunately you can't bring back to the store so you have to pay to get them returned. Learned my lesson.