Man-made fabric with partially 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 products effectiveness for blocking ultraviolet radiation as well as UVA/UVB radiation. This product was awarded the highest rating of 50+ UPF by independent testing. 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.