Gas mask with filter canister worn at demonstrations in Ferguson, Missouri

A Shalon Chemical Industries Ltd., adult model 4A1, Nuclear, Biological, and Chemical (NBC), black, rubber gas mask (2016.122a), with a Type 80, NBC filter canister (2016.122b) worn by Dr. Jelani Cobb during demonstrations that took place in Ferguson, Missouri during the summer and fall of 2014. The mask has five (5) adjustable head straps with plastic buckles that secure the mask on the wearer behind the head, an interior seal, two (2) wide, plastic view lenses secured to the mask with screws, and a plastic voicemitter attached to the nose cup. There is a plastic hydration port on the proper right side of the mask with a metal clip at the base. The mask has a round, metal, beige, threaded filter canister. The exterior of the canister has twelve (12) molded spokes on the front and six (6) indentations on the back. The interior of the canister has a metal plate over a mesh metal screen. There is a printed series of numbers in black ink on the top of the filter canister and molded marks and stamps on the interior and exterior of the mask.