Over the years I have tried to get on with many different balaclavas. They either restrict breathing, are too warm, too cold, flap about in the wind or irritate the face (especially when they pull on the old bristles). The Mountain Junky balaclava addresses all of these issues. It can be worn under a climbing or military helmet without restrictions, it fits close to the skin without any gaps allowing wind in, if pulled over the mouth the material is so breathable that it doesn't restrict breathing, because of its hypoallergenic properties the balaclava is extremely comfortable to wear and wont irritate even the most sensitive of skins. In my opinion the most comfortable balaclava I have ever worn and certainly much less expensive than some I have bought in the past.