These socks use combed cotton yarn, which is a very soft version of regular cotton. Combed cotton doesn't have any impurities or short protruding threads, is stronger than regular cotton, and is made by treating the cotton fibers before they are spun into yarn.
They fit pretty well but not as warm as I'd had hoped. I actually chose the wrong style as well and Chup was kind enough to send me the replacement socks to fix the mistake. Really appreciated their customer service and patience.
Das passiert wenn man sich nicht entscheidet kann.