Okay, they keep your feet warm, but I wouldn't say they're particularly comfortable. They feel very bulky and "knitted" on the inside, making it look like there are creases in my socks. They also tend to "twirl and turn" at night while sleeping, which is annoying and uncomfortable. On the other hand, I've had them for a long time and the capture points have NOT fallen off. And they really prevent me from slipping on hardwood floors. But as I said, they are not very practical. I have found other socks (ankle length) that I like better and use them for sleeping.
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