INSTRUCTIONS: People choosing to use a scarf for respiratory protection should carefully follow user instructions. Do not use this face scarf in oxygen deficient or explosive atmospheres. Once the middle layer particle filtering textile is clogged with microscopic particles, there is an increase in breathing resistance and a new scarf is needed. Inspect the scarf before each use and dispose if any damaged parts. This scarf is washable but the cartidge is strictly not washable. Please avoid rubbing the cartridge media which can damage the Nano-fiber layer inside. Individuals with respiratory ailments should consult a physician prior to use. When stored under indicated temperature and humidity conditions, this scarf may be used until the date indicated on the packaging. Discard with solid waste.