Washing your Cap
The caps can be washed. Don't worry about the bills, they're made of flexible plastic. While some people have had success just popping the cap into a washing machine, we strongly recommend hand washing with a mild detergent in warm water.
Furthermore, if you're one of those folks that likes to wash your cap in the top shelf of your dishwasher, be very careful that your detergent does not contain bleach. The treads for the embroidery are either Rayon or Polyester thread and these threads cannot be exposed to bleach.