Pukka's caps can be washed in either your dishwasher (remove before drying cycle) or in your washing machine (remove before spin cycle starts.) Let all caps air dry. Prior to washing we recommend that you use a hat wash rack. Follow this link to see an example http://www.organizeit.com/baseball-cap-washer.asp
Sun hats can be washed in the top rack of your dishwasher, just remember to take it out before the drying cycle starts! Let the cap air dry.