d0bhran wrote a review of Outdoor Research Snoqualmie Sombrero on October 14, 2013
Familiarity: I've put it through the wringer
Fit: True to size
I have had this hat for 18 years now. I don't mean I have had a couple of these hats in this style for that long. I mean the same d@%# hat! Absolutely bombproof. Every winter it is my goto hat. Cold, wet, and windy are what this hat thrives in. I have always liked large brimmed hats for the sun protection they provide, and prefer to grab this over any beanie or other hat for cold weather. Obviously, this isn't a very good hat for warmer weather. Anything above 65-70 degrees and I have use something else, but what do you expect? It's a winter hat, not a year round jack of all trades hat...
In short, if you need something to keep the sun off your face, the rain/snow off your head, and the wind from stripping away the valuable body heat, this is the hat you are looking for.
You don't have to be dead on with the sizing. There is an adjustable band inside the sweatband on the hat that allows you to fine tune the fit of the hat.