Works as  described. comfortable and warm.  Used for biking and running.
Usually used full on covering head and face or with the face guard pulled down. Can be used as a neck gaiter as well.(or as a slightly weird looking beanie).

Material provides insulation and still breathes. Warms up air your breathing in warmer without making it feel like you are breathing through a straw. (especially important if you are a mouth breather or are pushing the pace on a workout)

I would def. recommend this to anyone.