Tilley's best-selling broad brim AIRFLO hat sets the standard by which all other outdoor hats are measured. Constructed of lightweight breathable Supplex nylon with a cooling 3/4" AIRFLO mesh band in the crown this topper provides excellent sun protection ventilation and moisture management - and may very well be the last hat you ever buy! Designed with a medium brim that snaps up Aussie style the Tilley Endurables LTM6 Airflo Hat features a 3/4-inch polyester mesh in the crown for coolness and comfort during hot days and strenuous activities. It's made from 100 percent supplex Tilley Nylamtium a form of lightweight nylon that's lightweight and resistant to water. The fabric has also been certified to block 98 percent of harmful UVA/UVB radiation and deliver an ultraviolet factor (UPF) of 50+--the maximum rating given. Other features include a dark underbrim for glare protection and floatability. It also ties on in windy conditions. Each Tilley hat is hand-sewn and all seams are lock-stitched so they won't unravel. It also comes with a secret pocket in the crown to safely and securely store items such as a driver's license room key or a $20 bill. Machine wash on delicate cycle separately or hand wash in cool water. Do not use bleach. Guaranteed for life not to wear out.