This hat is surprisingly warm for how light it is. It really does stop the wind very well. The drawstring is great for holding the ear flaps down when the wind blows. The material is soft and comfortable. I've had the hat for two months and it still looks like new.

I used this extensively on a winter (70 mile) hike thru the GSMNP in February. You barely notice it - very thin, lightweight and comfortable. If warmer, you can fold the earflap part up with the chinstrap on top of your head; if really warm, the strap allows you to hang it off the back of your neck in front of your pack. For single digit temps in windy conditions, I used a buff below, a fleece cap over it and my windbreaker's hood cinched down, and was still toasty at a wind chill way below zero. Packs small as well; I kept it in a small chest pack attached to the main backpack, along with snacks, water and emergency gear.

Love this hat for under my climbing helmet in the winter. I have a really large hat size, so it's a bit tight , but that allows me to fit it under my helmet without a lot of extra bulk. Keeps the wind out and my head warm. The ear flaps are nice, and can be tucked up when you don't need them. Doesn't pill up either. Full disclosure, I've been part of the Gore MountainTechs program since 2007, but I picked this hat up on my own.

This is a perfect and typical OR product! What surprised me about it was how light it is! When i saw it on the web I thought maybe one of the reasons that it is so effective would be because its bulky, but i was surprised (in a very good way)to feel how thin and compactable it is. Mine has been through seriously nasty, windy, snowy conditions in Wyoming, North Dakota, Oregon and Colorado. Some of the winteriest winters in the country and it was awesome. Fantastic product, no complaints!

outstanding hat that fits under my helmet, when used with my buff, everything is totally covered and toasty warm! Thanks again OR!

Just got this hat in today. Fits perfectly and comfortably. Lightweight, feels like it will be very warm. Covers my entire head and ears.

Was out in a blizzard in this hat and it felt like there was no wind at all. I was almost too warm. Tested in freezing, snowy, windy mountain conditions.