4. Winter hat versus cap
Winter Hats vs. Caps: Cleaning and Care Guidelines
For winter hats, if you do not wear them daily, washing them once every two months—about three times a season—is enough. Most can be machine washed, but always check the care label for specific instructions.
Caps need a gentler approach. Hand wash them twice a year in cold water to prevent stains and help them keep their shape and color.