The Proguard Respiratory masks & filters range are approved for use against the dust, particle, mist, aerosol, fumes & gases in accordance to EN140 & EN136. There are many potential respiratory hazards in the workplace such as dusts & particles from processed materials such as metal, fiberglass and asbestos or condensation such as pesticide spraying. Fumes, gases, smoke and vapours constitute an additional risk, as do airbone micro-organism bacteria, viruses and spores and radioactive particles.