The PM 2.5 masks are specially designed to protect the user from probable respiratory ailments and allergies originating from the polluted air in the cities and common allergens like pollen in the environment. These masks have a 3 layer filter media which ensures the best protection. The masks come with a valve for moisture release which reduces stuffiness and heat build up to ensure wearer comfort for longer hours. These ergonomically designed masks with special comfort features like skin-friendly lining, soft cotton ear bands, premium nose pad for better seal and comfort and soft adjustable nose clips make them one of the best masks to wear for extended hours even in hot and humid conditions.