Hot tenters use canvas tents of different styles with wood stoves in very cold weather, down to -30C or colder. www.wintertrekking.com is the place to learn all about hot tenting.
FYI, there is a thread on wintertrekking about traditional v. high tech clothes that I started when I joined the site 6 years ago that is still going on, I am pleased to say. It's an interesting topic with some great comments on how different materials work at different temperatures.