Made with double layers of fabric, a filter can be placed between layers for additional safety. It is lined with modal jersey knit, an all-natural fiber made from beechwood trees. It feels soft and smooth on the skin. The Rhodium chain never tarnishes and plating never rubs off. Easily add hair pins for added stability. Mask can be worn over mouth and nose or pulled down and used as a fashionable collar. Various options for chain.