You might be confused reading all the different blends used in wool socks these days, but for the most part, this is a good thing. You don't really ever want a wool sock made of 100% wool, as the fabric won't hold shape on your feet and could prove to be itchy or scratchy. A sock made with 100% wool can also trap too much heat, resulting in sweaty feet.

Instead, look for wool socks with respectable percentages of wool—some use up to 80% of wool while others might use as low as 20%. Also, most of the best wool socks today are made with Merino wool, since you still get natural thermoregulation from that fabric but it's also breathable and moisture-wicking. Other added fabrics like nylon, spandex, and elastane are good signs to see too because you'll know the sock has a level of stretch and a snug fit to your foot.