Sun protection: With UPF 50+ to block out 98% of harmful UVA and UVB rays. Design For Outdoor: Whether you’re fishing,camping,gardening,or hiking,our sun hat will keep your head and face protected from the sun and heat. The adjustable drawstring ensures your hat stay safe on head in wind. Size: Fit for head circumference 22 inch~24 inch,side brim 3.2 inch, neck flap 10.3 inch. Style Cool: Our lightweight hat is mesh vents for cooling airflow through the crown,hat is made by polyester, quick drying. Hidden neck flap can be fold into rear brim for daily use, fine collapsibel easy to carry.