The M50 NBC (Nuclear, Biological, Chemical) Mask is a light, comfortable, durable, and effective gas mask. It was selected by the Morrow Project because of its prevalence in the United States armed forces, as it would be easier to find replacement filters for the M50 in the field.
d20 Modern Rules: A character wearing an M50 NBC Mask is provided total protection from eye and lung irritants. The M50 NBC Mask uses twin filters that last for 24 hours of use, and feature an indicator that turns blue when the filter has expired. Changing the filters is a move action.