Blocks uv rays: UPF 50+ designation is the highest UV protection certification available which blocks 97.5%+ of cancer causing UV rays from penetrating the material. Comfort & quality: We developed our fabric to be lightweight & breathable for maximum comfort & protection. Gentle: 100% woven paper provides only the gentlest touch. Spot clean with cloth California born: for the last 30+ years, we've been designing and testing our hats in sunny Santa Monica, California. This has given us the time and environment to perfect The hat fit and design.