One Size: Casual unisex hat, comfortable and comfortable fit. Hat size available from 22 to 24 inches (56 to 61 cm). Adjustable elastic string design at the back, one size fits most adults. Waterproof Sunscreen: 3.2 inch wide brim. 10.8 inch UPF 50+ shawl excellent sun protection. Shields the sun from your face and neck and provides excellent protection from harmful rays. Adjustable and Breathable: Adjustable chin strap keeps the hat in place even in windy or rainy weather. Includes internal moisture wicking sweatband. The mesh crown keeps the head cool and ventilated. Lightweight: Rolled up to carry and save a lot of space. Hat weight 0.1KG. It's a perfect hat for the beach, pool, park, fishing, hiking, camping, traveling, hunting, gardening or any outdoor sports and activities.