Respirators feature the Moldex Dura-Mesh shell, which resists collapsing in heat and humidity. It has a molded nose bridge that seals easily without a metal nose band. The naturally contoured facepiece and Softspun lining give the respirator added comfort and durability, as well as relieve pressure points. NIOSH certified to have a filter efficiency level of 95% or greater against particulate aerosols free of oil. The respirators are available with the Moldex HandyStrap with buckle that allows the mask to hang down around neck when not in use and they are available with a Ventex valve which lets the hot air out faster so workers stay cooler, or available with an added carbon layer to help filter out nuisance levels of ozone and organic vapors (less than OSHA PEL).