Avon Protection CTCF50 Riot Agent Filter Black Pack of 4. It is specifically designed for removal of riot control agents and tear gases including CS CN and OC pepper spray. Specifications for Avon Protection CTCF50 Riot Agent Filter: Manufacturer: Avon Protection Color: Black NIOSH Rating: NATO Age Group: Adults Fabric/Material: Polyphenylene Ether Features of Avon Protection CTCF50 Riot Agent Filter Conformal shape providing low profile Unique Humidity Indicator 5.5 year shelf life Protection against CS CN and OC riot agents Package Contents: Avon Protection CTCF50 Riot Agent Filter Avon Protection 72606-3: CTCF50 Riot Agent Filter Black Pack of