Rating: 4 / 5
Initial review, as I just received it. High BMW quality as always. Pertex Quantum and Polarguard Delta. Neat general detailing. Sample I have weighs 1.8 oz. ( listed at 2.1 oz.). This insulated balaclava is best suited as part of a sleeping system or other non-activitiy as the face opening does not offer peripheral vision. In all other ways the opening and volume can be adjusted to fit a wide size range but, the Balaclava is not as versatile as a hooded insulated jacket as it is not suited to wide field of vision requiring activities. This being said, it offers a lot of warmth for the weight---definitely better than the fleece balaclava (at the same weight) it will largely supplant.
I hope that the next generation of the balaclava will address this issue by designing a wide ovoid cut for the face opening, possibly with an elasticized periphery, which I think would be more comfortable than the elasticized drawstring which is currently used, when the opening is drawn tight.
Being as I bought the balaclava with use as part of a quilt sleeping system a primary consideration, I still give this a "4". it's unique on the market.