Whether you're heading to the beach, out on a hike or a boating adventure the Mission Sun Defender Cooling Hat is a necessity for any outdoor adventurer that gets exposed to the sun. The wide-brim design and UPF 50 fabric helps shield your head and face from sunburn while the neck nape keeps you protected from the midday rays. Plus this hat is powered by HydroActive cooling technology to keep you cool and comfortable in the heat. In under 30 seconds the Mission Sun Defender Cooling Hat cools to 30 degrees below average body temperature in 3 easy steps: Wet it, Wring it out and Wave it. For optimum comfort and function, there is an adjustable elastic chin cord, and rear strap for a perfect fit. Mission products are made of proprietary performance fabric with cooling technology that is activated by water and provide chemical-free cooling that is always reusable and washable. Features: HydroActive cooling technology The wide-brim design and UPF 50 fabric helps shield your head and face from sunburn The neck nape keeps you protected from the midday rays Sun Defender Cooling Hat cools to 30 degrees below average body temperature An adjustable elastic chin cord, and rear strap for a perfect fit Specificatons: One Size Fits Most - Elastic Pullcord Adjustable Brim: 3.5 inches Minimum Size: 22 inches Maximum Size: 24 inches Country of Origin: Imported Mission Sun Defender Cooling Hat