Add another vote for the Tilley hat. I have an LTM6 - the one with the wider brim and the mesh at the top for airflow. I have a BIG head and it was the only hat I could find to fit ... and it fits very well. It is very comfortable - even in high wind. The synthetic material resists rain, cleans easily, and dries quickly.

At first I was a bit concerned that skeeters might find their way through the mesh and get me, but that's not been a problem at all.

I liked the LTM6 so much that last winter I bought a Tilley Winter Hat. Nice looking. Warm. Ear flaps. It does a great job keeping snow off of my classes (which drives me nuts). It reminds me of back in the 50's and earlier when a well-dressed man wouldn't be caught without a nice hat. Because it is made of wool they recommend dry cleaning rather than hand washing, which is OK with me. In winter it won't get as dirty as my LTM6 does.