Gas Respiratory Mask Without Filter With Valve - With valve. -Unfiltered. -Soft face frame and an adjustable safety restraint harness. -Respiratory mask made of soft green rubber. -Comfortable and efficient. -Sealed to the contour of the face. -Very flexible rubber valves with low resistance to inhalation and exhalation. -This type of mask has the advantage of being able to change and replace the filters whenever needed. -We have filters in the following references: > 15040036: FILTER 92110-A1 (Organic gases/vapours). >15040037: FILTER 92120-B1 (Gases/Vapor.inorganic). >15040038: FILTER 92590-A1B1E1K1 (Universal Mixed). -Article known as work clothing.