To use this advent calendar, start on December 1st. Every other day, open one of the doors on the calendar. Inside, you'll find a new pair of He - Man socks. You can wear them right away or save them up for Christmas Eve. When it comes to maintenance, you can machine - wash these socks in cold water. Use a mild detergent. Avoid using bleach as it might damage the colors. Hang them to dry to keep their shape. Remember, these are adult - sized socks, fitting UK sizes 6 - 10, EU sizes 39 - 45, and US sizes 7 - 11, so make sure they're right for you or the person you're gifting them to.