This hat is clever, but ultimately flawed. The fabric is windproof, as it should be. But the material has no stretch, so it does not snug around one's ears or head, which leaves them exposed and cold. Also, the hat is quite bulky and will not fit well under a helmet, which is a big negative for me. I can't use it cycling or skiing, which makes its usefulness really limited to things like running. I got a competitor hat with a windproof dome and stretchy material around the ears and top of the neck and I'm much happier with it. This one's going back to REI.
Feels true to size
Bottom Line No, I would not recommend this to a friend