I have the T6 for Summer and a TW2 wool one for cold/wet weather. The T6 has been washed a bunch, treated with Sawyers a few times, stuffed in a small pack pouch for weeks. Always shakes out to near new looking. Great summer hat.
Advice on sizing. Tilley states this:
The Tilley Hat fits more comfortably than other hats. It’s designed to be worn low on your head and slightly loose. It should be held on by gravity, not by painful pressure on your forehead! 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. The Hat should be loose enough that you can rotate it to the left and right, and lift it up and down, without friction on your forehead. When it’s windy, use the cord! I think you’ll be pleased with the way it fits and feels – especially on hot, muggy days.
My Cabelas carry the T6 and TWC3. Rei had the wool one.