Chemically treated Activated Carbon Filtration 5 layered PM 2.5 filter with N95certified protection Single exhale valve(prevents moisture buildup and makes speaking easier) Adjustable Nose foam(prevents spectacles fogging) Adjustable Head Loop (for advanced sealing) Comfortable wearing (ergonomically designed to fit to your face) Helmet Compatible Hawamask N95 Series has a headloop (elastic goes around your head ) instead of earloop ( goes around your ear ) this ensures that there is no air leak from your cheeks , enables wearing the mask for long hours .It has an Adjustable nose foam at the top is meant to be bent against your nose, which adds to sealing and prevents spectacles fogging . The ergonomic design of the fabric makes a good seal around the chin area . Hawamask N95 Series provides 5 layered N95 filtration i.e. it ensures 95 % efficiency in capturing harmful particulate matters suspended in the air.It is rated N95 against PM 2.5 particles ( particles such as dust , smoke and aerosols that have a diameter of 2.5μm or less ) Hawamask N95 series has a large exhale valve which ensures that you do not suffocate while wearing the mask. The fabric is just thin enough to wobble a little when you breathe, its right for use in summer and under a full face helmet. Hawamask N95 Series costs Rs. 280 and can last upto 4 weeks. Brand HAWA SKU 100996043_NP-1021550028 Model N95 Series