That when you wear them, they don't slide down your foot. Only elasticated at the top. Looked like a sport style sock, but doesn't fit like 1. Fits like some socks i bought off Amazon branded WORK. Made like a "warm" material that keeps ya feet warm.
I am a size UK6, these are far far to large for me or anyone below UK8. They are more like a thicker wool sock with little to no stretch so there is so much material. They do stay pulled up well so then i'm not sure if anyone with large feet/ calves would find them comfortable being too tight... Only keeping as i have just cut and sewn the toes down lol