One of the most sought-after brimmed hats in the world, the Tilley Airflo is lightweight and comfortable, and gives you total sun protection. Tilley Airflo designs incorporate mesh into the crown allowing coolness and comfort during hot days or strenuous activities. Engineered from Tilley Nylamtium, a strong water-and-mildew resistant form of nylon. The LTM5 is theAirfloversion of our LT5 Hat. It has a semi-sloping front and back brim and a relatively high crown.Measurements: _ Front Brim: 2 5/8", Back: 2 3/4", Sides: 2 1/8"GUARANTEED FOR LIFE: _Tilleys are replaced free if they ever wear out, shrink or fall apart. They`re so carefully handcrafted by Tilley in Canada, and made of such strong materials, that many outlive their owners.FLOATS: _ A layer of closed-cell foam in the crown, and sometimes in the brim, provides the Tilley`s positive buoyancy.TIES ON: _ When it`s calm, the Wind Cord stays hidden in the crown. When there`s a breeze, place the part with the sliding knots behind your head. When it`s windy or you`re sailing, use the chin part too.REPELS RAIN:_ The Lighterweight Nylamtium Tilleys are excellent at repelling rain.HYDROFIL ANTI-SWEAT BAND: _ Soft and comfortable, it picks up sweat from your forehead and wicks it away to your temple area where it evaporates.CERTIFIED SUN PROTECTION:_ The fabric and style of all Tilley Hats have been certified to block 98 percent of harmful UVA/UVB radiation and deliver an ultraviolet factor (UPF) of 50+, the maximum rating given.