Polyester + 15% acryl fiber+3% wool. They are thick enough to be warm, but not so thick they make my shoes feel tight. They’re plush and cozy just like you want on a chilly day and they’'re very pretty, as pictured.

There’s a black band sewn on the inside that helps them stay up better than a lot of my other boot socks.

The material is very nice to feel very soft and are a nice slightly thicker weight without heaviness or tightness. She reports a soft feel and thickness that insulates well from the fall temperatures.

I love the band, since they aren't constricting and don't bother my ankles. My only complaint is they’re pretty short, more like a quarter sock than crew.

Wash and dry very well. Came out of the dryer looking brand new. I wish they came in an all white pack. Will hold up well to washing - if that's not so, i'll edit my review.

They’re thicker than many socks (before washing), but in this case thickness does not equal warmth. I like the heathered grey and black, but it is not acceptable to only get one usable pair from each package.