Inevitably your Little Noggi will require a wash in due course.
As many features of Little Noggi hat editions are made with loving attention by hand, it's my belief that it deserves only the same level of care when washing - By hand.
Gentle cold hand wash using phosphate free detergent and rinse thoroughly. Do not wring or twist hat.
Air dry out of direct sunlight. Hang and rotate both sides to ensure even drying.
Do not permanently fold the hat brim. Your brim can be ironed to redeem it's original flat shape.
Shout out if you need instructions.