Tilley Endurables LTM3 Airflo Nylamtium Hat (Natural, 7 1/2) nylon Hand wash or machine wash on delicate cycle Medium snap-up brim with 3/4-inch polyester mesh in the crown plus dark underbrim for glare protection Constructed from water and mildew resistant from 100 percent supplex nylon Tilley Nylamtium Maximum UPF 50+ sun protection rating Secret pocket in the crown for storing license, $20 bill, or room key