All hats except Leather and Oilskin hats are fully washable.
Hand wash in cold water with laundry detergent. We recommend liquid, however well dissolved powder is OK. Mild stain removers and presoakers should be OK.
Immerse the whole hat in a bucket or tub then rinse thoroughly.
Dry on a towel on a flat surface, preferably in a warm but shady area.
If the material becomes creased, they can be removed by using steam or hot air (eg. from a hair dryer, etc).