Respirators and masks are made for specific applications. One type does not fit every application. To determine the best type of respiratory protection for your application know your hazards then determine the level of particulate removal or filtration efficiency you will need. At the basic level, NIOSH recommends N-95 respirators for low-level hazards. These type of particulate respirator protects against particles, but not necessarily gas or chemicals. For more protection, consider a gas mask respirator. A gas mask has a snug-fitting face piece and filter also known as a cartridge.