(w/Filter & Nose Wire Pocket)  {Denim} I fell in love with this Hemp blended organic cotton Denim. I washed this denim once before create the mask to know how the fabric transforms.  The color of Indigo “fade and flows out when you wash” and fabric gets softer and beautiful..  So, I recommend delicate wash with colors, or hand wash.  And hang dry.  Lining fabric is also rare and beautiful dead stock one.