Dual-polyamide CBRN Gas Mask lens design enhances vision. Switchable, side-mounted canister design simplifies weapon sighting. All black for stealth. Made of hypoallergenic, halobutyl material. Silicone nosecup. Mask design simplifies maintenance, disinfection and decontamination. Contoured sealing edge provides long-term comfort. Integrated speech diaphragm accommodates optional Drinking Tube device, sold in a separate Gas Mask with Drinking Tube package, for easy fluid intake during protracted responses. Replenish Gas Mask efficiency with CBRN CAP 1 Canister, sold separately. CAP 1 is a NIOSH approval that means it provides 15 minutes of protection.