Panoramic Mask Of Universal Size, Of Innovative Conception. Made Of Epdm, Large Panoramic Full Face Screen, In Shockproof And Antacid Polycarbonate, Speech Device With Encapsulated Membrane, High Efficiency And In A Central Position, Internal Half Mask In Epdm Equipped With Non-return Valve Groups. Threaded Connection En 148/1 For Use With Filters. En 136