Buri hat, Bulusan volcano Sorsogon circa1970s. Buri is a very versatile natural fibre like abaca, hemp, nito , palapa, rattan, nipa, anahaw, sawali, Cogon and many others. Now its various oil based polymer strings otherwise known as plastic. Imagine what a beautiful world it was before without plastic trash. If one would make something it would ideally be both made to last and ultimately biodegradable. I doubt if there are hats that would remain in a thousand years but that's a dunce cap. :)
