Cheap and effective
These things are nice; cheap, warm and stretchy enough to not limit your movement. They are soft and comfy, and the fit is pretty good, although the legs seem a little tight on me and I definitely don't have big legs. I feel like you don't really get full range of motion unless you pull the legs up to about mid-shin height. This isn't a problem for me though, as I'm almost always wearing long wool socks which would cover the part that these might miss.They work well enough that I wouldn't consider any more expensive options in the future.