Dettol Cambridge N99 mask filters over 99 percent of viruses, bacteria, pollution, and PM 2.5. Washable and reusable, average life of up to 3 months. Breathing valve and adjustable earloops for added comfort. Available in 4 sizes - XL, L, M, S - for the entire family. Trust of 2 leading global brands - Dettol and Cambridge Mask Co.