Military Grade N99 No Valve Medium (Env.) Blue

6- layers of filtration - Military grade N99 mask comes with two activated carbon layers and provides 99.97% protection from pm 1 & 2.5, harmful gases, vehicle exhaust, airborne bacteria and viruseslayer 1:- polyester microfiber; layer 2:- activated carbon fabric; layer 3:- melt blown, bfe-99%, pfe-99%, polypropylene; layer 4:- paper melt blown, bfe-99%, pfe-99%, polypropylene; layer 5:- activated carbon fabric; layer 6:-bamboo fabric/cotton fabric layer.