Norwex reusable personal facemasks are breathable and lightweight and have been tested and proven to filter 81% of .1 micron particles. They contain Baclock, an antibacterial agent embedded within the microfiber material that helps with self purification. Designed to be used in addition to other measures, including hand washing and social distancing , these washable personal use masks not only help reduce respiratory droplets from landing on surfaces they also help you avoid you touching your face in public.