Maoko Outdoor Sun Protection Hats for Women and Men (Available in 5 Make of Polyester With Mesh; One Size Fits Most / 2.5 x 13.25 x 14 inches Lightweight, protective hat for use in intense sun, heat, and humidity Perfect for any outdoor activities:fishing,hiking,camping,hunting,gardening and etc Adjustable or removable chin strap provides versatility. Vents and mesh lining in crown for cooling and moisture management