Warm = Thick
Similar to the other reviewer I found that this thing was great until I started flying down the hill and wanted to breathe through it. Its a thick fleece fabric which is soft and warm but not breathable. Its perfect for the lift ride up and keeps your neck and face nice and warm, but when you start breathing hard on the way down I have to take it off my face defeating the purpose.
The circumference of the whole thing is small for my face so it is tight around my nose and mouth. If it was a bit bigger maybe I would have enough room to breathe even with the thickness (like a bandanna fits), but since its so tight, no dice. Although you can't breathe through it it still works for neck warmth if thats what you are looking for...