Cambridge Mask Co Pro Anti Pollution N99 Washable Military Grade Respirator with Adjustable Straps Trusted lab tested British Military Filtration Technology filters almost 100% of pollution, gases, and bacteria and viruses. Ideal for people at risk of respiratory diseases, living in or travelling to areas with high air pollution / smoke levels Protection against harmful gases, odours, all PM; PM2.5, PM0.3, pollen, smoke, allergens and pathogens The world's most trusted reusable anti pollution mask now with adjustable straps, perfect for travel, especially to China or India. Presented in a slimline tin for storage, fashion friendly designs available in 5 sizes suitable for the whole family!