The Tilley Airflo provides sun protection in a lighter-weight construction. The design incorporates mesh into the crown allowing coolness and comfort during hot days or strenuous activities. Engineered from Tilley's Supplex nylon made of water and mildew resistant material. The LTM6 is the Airflo version of LT6 Hat. It has a broader brim and a taller crown than all the other Tilleys. For the proper fit, you should be able to easily insert two fingers, flat, between the middle of your forehead and the front of the hat. Washing Instructions: Machine wash in warm or cool water. Do not use bleach. Smooth and reshape the Hat by hand and set it out to air dry. This special order hat can take up to 5-7 days to ship.