I just bought a Tilley Hat and wore it in India. It is a little too light in color for me but they really have a neat way of staying on in the wind. There is a chin strap but also a strap at the back that keeps it really snug even in the wind. I kind of like the look of the Columbia hats better but sticking with my Tilley hat for now.
I washed it when I came home and it washed like a rag and did dry very quickly and looks like new.
NOT cheap! I bought mine in a baggage store and sure I paid top dollar for it but it was the day before we left for India. Mine was about $60 I think.