Flap Happy Unisex Baby UPF 50 Plus Crusher Hat with Chin Strap 100% Cotton Made in US Machine or Hand wash cold 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. GOODBYE SUNBURNS: This brim is designed to shade your precious little ones face, ears, and neck from the harsh sun, meaning more time having fun in the sun. COMFORT & QUALITY: We developed our fabric to be lightweight & breathable for maximum comfort & protection. GENTLE: 100% Cotton provides only the gentlest touch. CALIFORNIA BORN: For the last 30+ YEARS, weve 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.