A respirator that leaks at the nose bridge is the same as wearing no mask at all. The articles in this section explain how N95, KN95, and FFP2 ratings differ, why fit testing before first use is not optional, and how to match a filter cartridge to the specific gas or vapour in your workplace. You will also find guidance on cartridge replacement schedules, storage, and the warning signs that a filter has reached the end of its service life. Hacsons has been supplying certified respiratory protection across Pakistan since 1996. Browse the posts below or explore our full respirator range.