This hat is great all year-round if you hate wind. I climb the Colorado 14ers and never leave home without this hat, even in the summer. The chin string is a must unless you like losing hats to 70 mph wind. Put your sunglass arms over the flaps for maximum wind protection (and from hearing the whining from your climbing partners, if need be). Just flip up the earflaps if you get too toasty. It is also thin enough to wear under your ski helmet on cold days. I'm on my 4th one. I keep losing them, or maybe my friends keep stealing them...hmmm....If you're serious about playing outside, OR is the way to go!

I bought two of these so my boyfriend and I could have matching hats. We both love them. They are very warm, a good fit and keep the wind out. They are not very bulky so on the really cold days, you could wear another hat over it. It also fits under my bike helmet. Great price too. It's hard to beat.

I have a fat head so a large worked perfect for me. For comparison, I wear a Shoei motorcycle helmet in large.

This thing is toasty warm. Windstopper stops wind. As a side-effect, it also muffles sound some. I kinda wish OR had perforated the earflaps for better hear-ability. Then again, that'd let some cold in... I guess the R&D guys had an idea on what would be best.

I also look kinda goofy sportin' the Peruvian look but who gives a flyin' Machu Picchu, I'm hella comfy.

In general, it is a good hat - impervious to wind. There are few issues I have about it, though:

1. Because of the wind membrane, it cuts down on hearing big time.
2. If very cold - one may need a liner beanie for layering/insulation.
3. On snowy days the stitched OR logo on the forehead leaks after a while. Nowhere else, but in that spot the water seeps in.
4. If working hard, it gets a bit wet on the inside due to poor breathability.

This hat is a great all around cold-weather hat. I use it under a heavier one when I am at high altitude(14k+ feet), or sleep in it when on cold winter approach nights. The windproofing is great and the neck slider is key in high winds. Also if you don't need the ears down you can fold them up and it wears just like a regular beanie... cool.

I wore this hat under a cycling helmet in 30 degree temps and found it very warm, breathable and comfortable. The windblocking material that extends to the earflaps keeps one's ears warm, but it also makes hearing a bit difficult the way they are insulated.

I've found this hat works in most circumstances from skiing to under a climbing helmet. The Windstopper certainly does cut down the wind, but as with all membranes reduces breathability somewhat and hearing as well (though you can just fold one of the flaps of if you need to catch what someone is saying). I found the sizing to run slightly small and went with a large instead of a medium. I can get it to come down to my eyes (if I try), but it is cut in such a way that it never does this on it's own. Having the larger size also lets me put a lighter liner hat underneath (Arc'teryx LTW Beanie in my case) and fits perfectly.

warm and windproof also does a good job at keeping out precipitation
easily packable
excellent for days when a balaclava is too much or frigid nights

This hat is awesome. I have used it for several weeks now biking in below freezing weather and it stops wind dead in its tracks and breathes like a fat kid on a stairmaster. Fits comfortably under my helmet. I use it by itself for below-freezing aerobic activity and I wear a liner underneath for base camp. When it arrived it was not as soft as it looked in the pics but after a few wears and one wash it's as comfy as a baby blanket. It seems to be very durable and lightweight and looks like it won't pill up. The cinch is great too. At this price you'd be losing money if you didn't buy one...

I love this hat. It covers the side of your face and neck. This hat is super light and the windstopper in it is great for that ice cold wind in the mountains.

Covers head and ear. Perfect for cold windy day in the city.

Fits great. Very thin, but very warm.

Great. Warm and windproof, good to wear when on a kayak in Maine during April. Even in the water it's warm. Nice product.

Love the hat, use it for Cross country skiing and back country snowshoeing. The weather conditions were from near 0 degree F very windy conditions to 30 degrees F and sunny. The hat stops the wind! It is light weight and I love the ear flaps that can quickly be raised or lowered keeping them warm.

good hat