To use these ski socks, simply pull them up over your calves before putting on your ski boots. They're designed to keep your feet warm and comfortable during cold - weather skiing. When it comes to care, it's best to machine - wash them in cold water on a gentle cycle. Avoid using bleach or fabric softeners as they may damage the fabric. Hang them to dry to maintain their shape and elasticity. Also, make sure your feet are clean before wearing the socks to keep them fresh for longer.