Original Outback Oilskin Hats.
These are it's good points.
Solar Protection
Quick dry sweat.
Waterproof.
Lightweight n cool.
Crushable Packable n Floatable ( so when the wind blows it in the river,while your fishing, it floats back to you)
Hidden security pocket (for car keys, fishhooks,condoms if you're a cowboy!).
Room to write your name and address even!
