The Airflo Nylamtium® material offers UPF 50+ protection. The Ultraviolet Protection Factor (or “UPF”) rating system measures the UV protection provided by fabric. UPF of 50 means only 1/50th of the UV radiation (UVA/UVB) falling on the surface of the material passes through it. The Airflo comes with a very nice neck protector that tucks up inside rear of the brim. You can use the neck protector loosely draped for comfort, or Velcro it closed under your chin for maximum protection. The neck protector works wonders to keep the sun from beating down on your neck and shoulders, and really helps drop the heat quotient. Where the neck protector tucks away, the inner brim ring material is fraying slightly, but fortunately it hasn’t gotten any worse.
The hat has two neck cords (aka the wind cord), for use as fore and aft, to hold the hat on during inclement weather or windy conditions. I tended to stick the two straps up under my chin, and it has kept the hat on my head in 60+ mph gusts. It also has a secret stash spot in the crown, where you can stick some money, your name and address, etc. There is closed-cell foam in the crown to help the hat float, which I never did get to test!
The hat has Insect Shield® repellent guard, which uses Permethrin, a man-made version of a natural insect repellent found in certain chrysanthemum plants. It certainly helps keep the bugs away from your face, neck and shoulders. It is supposed to last up to 70 washings?