Cotton blend socks are one of the biggest mistakes you can make for skiing. Cotton absorbs sweat and holds onto it, leaving your feet damp and cold all day. Since ski boots trap moisture, that wetness has nowhere to go, creating a recipe for blisters and freezing toes.
The problem is that cotton dries incredibly slowly, so once your feet get wet, they stay wet. This is the opposite of what you want in a ski sock, where moisture management is critical for warmth and comfort.
Instead, look for merino wool or merino-synthetic blend socks. Merino naturally wicks moisture, resists odor, and stays warm even if it does get damp. A merino-synthetic blend gives you those benefits plus added durability. Save the cotton socks for après-ski lounging, not the mountain.