Okinawan banana-fiber helmet

height: 7"
circumference: 37 1/2"
weight: 6.2 oz

Received in 1998 from a pilot in the U.S. Navy. His description was that this is a "Okinawan helmet made of banana-tree fibers and bark. Hand made by a 90 year old Okinawan, who is the only one who still knows how to make these."I have been unable to verify this information - please email if you can shed any more light on the subject.