Hats tend to get a bit dirty from the natural oils in your hair. Hats need to be washed frequently to remove the bacteria that like to live on your head.
We recommend washing your hat by hand in cold water and leaving to dry on a flat surface.
If your have a stubborn stain, try soaking in the EcoStore Laundry Soaker & Stain Remover. Then continue to wash by hand to extend the life of you Buns Out hat.