I agree with other reviewers that these tend to run a little small. I have size 9 feet, but I don't think that a male wearing a larger size would be able to wear these.

That one caveat aside, these are really, really warm. My feet were the only part of my body that I couldn't keep warm enough in my apartment, so I decided to get some insulated slippers. These are both really, really warm and very, very comfortable. Previously I had tried wearing thick wool socks with house slippers but they were never warm enough, but these booties more than do the job.

So as long as you keep in mind that they run really small, these are really great slippers.