I have 3 black pairs per house in size 48 (I have big feet). They are a part of myself during the winter. Maybe I'll get another one for the basement. If you walk a lot, they will wear out. For example, for exercise, it's good to wear regular athletic shoes with air soles. They are very comfortable closed slippers and warm. My favorite ones during the winter. If they smell, you spread baking soda from the supermarket without water and the next day you clean them with paper. If you want to wash them, it's better to do it on the hottest day of summer to prevent them from rotting and smelling worse.

It is one of the best purchases I have made recently!
Just what you need to keep your feet warm in the winter. You put them on and forget about it.
Very good quality materials!

The big question that everyone has, I think, will initially be about the size. I wear Nike 45.5 and I also bought the Thermoball in 45.5 and they fit perfectly. I bought them for use at home as I have very cold floors in the winter, possibly a bit of an overkill, but they do their job perfectly! They can't be compared to any winter slipper, they are very lightweight, comfortable when worn for many hours, and the warmest thing one can buy in the form of a slipper. They are easy to put on, even easier than one might think by looking at them in the picture. I can't give an opinion on their durability yet as the purchase is very recent, but I will provide an update.