Inspired by the Japanese Yoki Tengu.  100% Japanese cotton denim, black.  With spike tooth. Traditional Japanese print  Lining.  Red topstitch.  New foam nose bridge construction, offers maximum comfort.  Velcro back. 2 PM2.5 replaceable Active Carbon Filter (N95 compliant), included. Regular size fits most head sizes, large is 1 inch longer.elcro back. 2 PM2.5 replaceable Active Carbon Filter (N95 compliant), included. Regular size fits most head sizes, large is 1 inch longer.