Hurley is known for head-to-toe fun in the sun, and this sun hat takes care of the head part. It's made of matte stretch nylon tricot fabric with a comfy feel. There is a UPF 50+ finish to help protect littles from the sun's harmful UV rays (only the parts of the head covered by hat are protected), the wide brim provides some shade and the built-in chin strap has a hook-and-loop closure for a stay-put fit.