man-made fabric with partial recycled plastic resembles genuine raffia straw. it will not crack or melt when wet and is more durable and lightweight than natural fiber straw. lightweight and packable. blocks 95% uva/uvb rays. independent testing in accordance with aatcc (american association of textile chemists and colorists) test methods have determined this product's effectiveness for blocking ultraviolet radiation as well as uva/uvb radiation. this product was awarded the highest rating of 50+ upf by independent testing. due to the weave of the ventilated band of the squishee® bayou, tiny areas may provide less than 50+ upf. to learn more about aatcc testing, go to www.aatcc.org. this product expresses love for the environment by reducing waste. the most sustainable products are those that we treasure forever. packable ; lightweight - blocks 95% uva/uvb rays - fedora hat of squishee® with ventilated band - elasticsized inner band fits most - signature rivet logo in back of crown - brim span: 3"