Ryu Jin is the fabled Japanese Dragon King.  100% Cotton Japanese Denim black color with dark gunmetal gray stitching.  100% Cotton Japanese Print Mask cup liner.  100% Cotton black ribbon trim.  2 PM2.5 Replaceable Active Carbon Filters included, N95 Compliant.  New foam nose bridge construction insures maximum comfort.  Regular fits most head sizes, Large is 1inch longer.