The socks are very fluffy and soft and therefore very comfortable to wear. In the sole flaxseed are incorporated which heat up in the micro, thus ensuring the heating effect. The seeds make the socks logically slightly heavier but the market hardly.
The waistband has a relatively narrow dimensioned probably just to keep the weight of the socks. My girlfriend has shoe size 41 and is completely satisfied with the 41-45. However, you should not have much larger feet because the federal government is too tight and then cuts.
Although the rubber keeps the socks well, you still can not get much running around with it but she is not never done. The occasional passage in the kitchen keep them out anyway.
In the manual though is that the first few times some moisture when warming up the sock forms, which disappears after a few minutes again, but that's now after 8 months is still the case. While it interferes in no way, however, is true because not all the description.
Round but a class product which I can only recommend. Would the heat last longer would get the socks still the 5th star.