The hat has an oversized brim. It has many pieces, to protect the neck, the face etc. The parts are not sewn permanently and so you can remove the parts that you do not want at a particular moment. The hat seems to be made form a kind of polyester.
https://www.amazon.ca/gp/product/B071FWPV9D/ref=oh_aui_detailpage_o07_s00?ie=UTF8&psc=1
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