Coolibar UPF 50+ Men's Crushable Ventilated Hat - Sun Protective Cotton/Polyester Canvas UPF 50+ - protects against 98% of UVA and UVB rays Broad 3 inch brim for great UV protection, mesh ventilated crown for comfort and nternal elastic band for a snug fit Adjustable chin cord holds hat in place, even in windy conditions; Travel-friendly, crushable and packable Max circumference: (S/M) 22 1/2 inches (L/XL) 23 5/8 inches (XXL) 24 3/8 inches Spot clean; Imported