Size:Best fit for 55-59cm 6 7/8 - 7 3/8, 21.6"- 23.2".With an adjustable tape built in sweatband to help find the best fit.
Sunscreen:The 4.1" wide brim blocks most sun UV rays and provides excellent full coverage of head&face.Great ventilated to keep you cool in summer.
Flap Sunhat:The Mesh flap could stop sunlight,and protect your neck from harmful UV rays while mesh flap also provides great breathability.
Crushable and Packable: you can easily fold it and tuck in away in suitcase, great for cruise, outdoor trip, beach vacation and the like. Also it can regain its shape easily, but sometimes you might need steam/ironing machine to reshape it.
Practical: great for daily and outdoor activities: driving, fishing, hiking, golf, camping, traveling, hunting, gardening, trucker etc.