Medium brim hat made from fabric derived from an incredibly durable sailcloth Constructed from water and mildew resistant 100 percent cotton duck Maximum UPF 50+ sun protection rating Secret pocket in the crown for storing license, $20 bill, or room key Hand wash or machine wash on delicate cycle The legendary Tilley Hat, 'The best, most practical outdoor hat in the world.' Chosen again and again by those of discerning taste worldwide, this most sought-after Tilley has a medium snap-up brim, glare reducing dark underbrim and is fashioned of heavyweight 100% cotton duck canvas for durability. Designed with a medium brim that snaps up on both sides, the Tilley Endurables T3 canvas hat is constructed from fabric that's derived from an incredibly durable sailcloth that is still used in boating today. The pre-shrunk 10-ounce, 100 percent cotton duck is both rain and mildew-resistant. 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.