Survivair has obtained NIOSH approval for its current Opti-Fit CBRN (chemical, biological, radiation, and nuclear) Gas Mask for use with the current Opti-Fit Tactical canisters. First responders can use this one gas mask for both riot and CBRN situations, simply by changing the canister. The Survivair Opti-Fit CBRN Gas Mask with Tactical canister is lightweight at under 2.6 pounds, features three canister-mounting locations, and has an impact-resistant nylon frame and lens. The Survivair Opti-Fit CBRN Gas Mask with Tactical canister for riot situations provides protection against CN and CS and includes a built-in P100 filter for protection against particulates such as pepper spray. The mask is available in three sizes: small, medium, and large.