Chaos CTR Summit Expedition Hat 100% Polyester Imported Air Vents and perforated side panels provide air flow to keep you cool Chaos-CTR Summit Expedition Hat features SCAFE 50+ UPF SUN PROTEECTION Wide floatable brim not only shades eyes, face and neck, it also provides UPF 50 sun protection Internal cinch Cool Max sweatband size adjustment feature allows you to customize your fit Removable chin strap insures hat won't fly off in the wind Air Vents and perforated side panels provide air flow to keep you cool