KN95 professional quality face masks are designed for your maximum protection, whether at work or at the mall. These disposable masks are constructed of five layers where three layers of a non-woven fabric sandwiching two layers of a meltblown fabric. Place the two loops around your ears, and then affix the metal band tightly around your nose for a snug fit. They are effective as a particle and droplet barrier. They should be discarded after a single use or approximately four hours of wear.