Parcil Safety NB-100BThe NB 100B has many of the same great benefits as Parcil's Safety's NB 100 tactical gas mask but features the ability to take industry standard bayonet style filters, making it appropriate in a commercial setting as well as a military or tactical setting. Designed to offer passive protection, contamination avoidance, and mitigation from hazards, deadly chemicals, and violent assaults, the NB 100B is a useful tool for defense during dangerous events.