We bought two of these to protect our faces during the final summit day on our climb up Mount Kilimanjaro. They did a great job in keeping us warm and covered from the elements. The build quality is solid, as are the materials. However, the mesh breathing window CAN be a little difficult to breathe through, and it still allows a lot of breath vapors to flow inside the mask, fogging up goggles and such. Still, it's a good balaclava, and it makes one look like an intimidating ninja. And since ninjas are arguably the coolest people ever, I can't give this any less than four stars.