Tough Headwear Balaclava Ski Mask for Men & Women
In my experience with this type of equipment , this balaclava is very good. On a scale of 1 to 10 with 10 being no restriction to airways at all, this would rate an 8. That being said, any physical device covering nostrils and mouth will be somewhat of a hindrance to breathing and air exchange. My wife and I each use one and are very happy with them. We use them almost daily. The trade off is that we would rather dodge frost bite on our noses and chins than have perfect breathability.