Robust design of glass and housing: it adapts well to faces of different shapes and sizes, maintained the form properly during use and is resistant to deformation 3 M™ valve Cool Flow™ Cool Flow valve reduces heat buildup to provide to the workers comfortable protection, even in warm or humid environments carbon layer: provides protection against nuisance levels of organic vapors (below the threshold value limit, TLV) color coded straps: easy performance level of recognized by straps with color - coded FFP1 - reliable and effective protection against dust, mist and nuisance levels of organic vapors Compatible with: eye protection 3 M, hearing protection 3 M design, comfortable, lightweight, and separated from the face thanks to its convex shape, nose clip and its design of two strips, adapts perfectly to a wide variety of sizes of faces. 3M™ 9914 particulate mask offers protection resp...