This is a UPF 50+ Hat for Premium Sun Protection. What is UPF protection? Follow this link for more information! 
https://www.hatsunlimited.com/what-is-upf/

The Jeanne Simmons Paper Braided Tweed Visor offers versatility and the ability to take it anywhere! Made from 75% paper braid and 25% polyester it is a comfortable and durable hat that has a UPF of 50! This hat is packable and crushable and has a comfortable sweatband with a Velcro closure for a sure fit. Comes in natural/black, tan tweed or a white tweed.