3M Secure Click Particulate Filter P2 R D3125 is CE approved for environments containing certain particles. New dual flow cartridges and filters allow for easier breathing, Protects against particulates, Quick, simple connection. Simply align the connections and push until you hear a click, Use with 3M Secure Click Reusable Respirators 800 Series, Swept-back design allows an enhanced field of view and comfort, Use for protection in hazardous environments, CE approved 1 BOX 20 FILTERS (NOT PAIRS).