Phil, I have the both the Filson and the Yazoo and like both below 40 degrees. The Yazoo is lighter but the Filson stays on my size 8 head better. I've had the Yazoo for 20 years and the Filson for 12 and wouldn't give up either (although I must confess I wear them both more for Ice fishing than I do duck hunting.) I mostly wear my brown waxed canvas Kromer until late in the season and then switch to the warmer hats. The price tag on the Filson is steep as I recall, but when I find a hat that fits and I like, I tend to not pay too much attention to the price. Besides the way this thing wears, the cost per year of owning it drops every season.
Ron