Wash at 60°C / 140°F. Do not tumble dry, iron, bleach, or dry clean. It's probably not a good idea to wash it with regular laundry either, especially if the towel has absorbed any smelly gun juices.
Product description
You could do your gun polishing work even with a wool sock, but it's better to keep those socks on your feet and get a dedicated towel for polishing.