Imagine a hat that floats, repels insects, blocks UV rays, won't shrink, is machine washable and only weighs about 3 ounces. Well, here it is. It's Tilley's AirFlo Hat with Insect Shield® and it will keep you cool as you can be while keeping biting insects at bay. Insect Shield® repellent technology is ordorless and invisible repellent from mosquitoes, ticks, no-see-ums and other biting insects – good for up to 70 washes! The mesh-sided crown allows air to flow through, and it's made from Tilley Nylamtium®, a strong water- and mildew- resistant form of nylon. Brim measures 3¼ in the front and back and 2½" on the sides.