I'm a postie in Vancouver, BC and I'm out all day in all manner of weather. Neither rain nor snow nor gloom of night... I was in need of a decent hat to keep the wet at bay. My faithful cotton Tilley hat is great for summer sun and brief showers, but in steady rain it eventually gets saturated and stays that way. I tried the corporate-provided "rain hat" and discovered (within an hour or so of moderate rain) that despite the waterproof fabric, it wasn't even remotely seam-sealed. So, I gave the Seattle Sombrero a whirl. After several months of use over an especially wet winter, I can confirm that it works. Very well. It's genuinely waterproof, and the brim is big enough to direct the water over my collar and down the back of my poncho (and eventually into my shoes). Long after my poncho has steamed up on the inside and my Gore-Tex shoes have filled up from the top, my head remains dry and comfy. When the rain stops it breathes quite well even when I'm charging around with a satchel full of mail. It stays crammed in my pack when it's nice out, and although it's a little disheveled-looking when I pull it out it *foops* back into shape after being on my head for a few minutes. My only minor quibble is that the brim isn't quite stiff enough - I like to push the front of the brim up to keep the runoff from dripping onto my handful of mail (looks dork-o-rama but it works) and it doesn't always stay pushed up. Also, it gets a little flappy in strong wind. I don't use the chin-strap (I tuck it up inside), and it looks to be easily removeable, but I find it useful to hang the hat up to dry at the end of the day. tl;dr - waterproof, breathable, durable, comfy. Absolutely worth it!