This canister is designed for first responder applications commonly found in law enforcement, fire and emergency response (paramedics) environments. Unique, patented carbon technologies make this cartridge more comfortable for the wearer.Approved to NIOSH Chemical Biological Radiological Nuclear (CBRN) requirements in conjunction with the following 3M Full Facepiece Respirators: FR-M40B-10, Small; FR-M40B-20, Medium; FR-M40B-30, Large and FR-7800B-S, FR-7800B-M and FR-7800B-L.