Details: The "Sun Protective" hat is 80% nylon and 20% spandex. Fabric features UPF 50+ sun protection. 

Here's why this is perfect for Whatever Your Day Brings®: Keep them cool and protected from the sun's rays in this UPF 50+ sun protective hat for babies. Made of light-weight fabric and held secure with comfortable straps to tie under their chin, this baby sun hat is perfect for full days at the beach lake or pool!