Nice sun hat
I like the rear drawcord to adjust fit. I usually put the chin cord inside the hat before I put it on my head. If it is windy I simply pull the strap under my chin and adjust to fit.
The mesh breathes well and the sweatband works well to keep moisture out of my eyes.
My only suggestion would be to put a wire in the brim around the outside similar to what is found on technical rain jacket hoods.