When working in certain environments the personal protection equipment needs can change extremely quick. Some situations require safety glasses, others hearing protection and others can require a respirator. If a respirator is needed, the danger from inhalation of gasses or substances is a possibility and with the North Safety, N75001L Organic Vapor Cartridge you are protected from organic vapors. Compatible with North respirators these cartridges are designed to fit that specific application. Please check manufacturer’s specifications when installing cartridges on masks other than North brand.