Having cold or achy feet while you're skiing can make you miserable. Fortunately, the socks you choose can play a big part in keeping your feet happy. Typically, the best ski socks are thin enough to fit comfortably under your boots, incorporate merino wool for warmth and moisture management, and feature strategically placed cushioning.
When you start shopping around, consider the following elements:
Height: You'll want socks that are tall enough to reach the tops of your boots (and even poke out a little) so they can protect your skin while staying up without bunching around your heels.
Thickness: Although it's a little counterintuitive, thinner socks are actually better when you're skiing, as long as they're made with materials that will keep your feet warm. Thin socks can wick away sweat more efficiently and fit better under your boots than thick, bulky ones.
Moisture control: If you want to avoid damp, uncomfortable feet, your socks need to be breathable, moisture-wicking, and quick to dry. That's why the best material for ski socks is usually merino wool, sometimes mixed with nylon, acrylic, or elastane for a bit more stretch.
Cushioning: Your socks need to be able to absorb impact, especially if you're into skiing hard and fast or jumping. Make sure they have ample cushioning around high-impact areas like your heels and the balls of your toes.