industrial dust respirator: 1) Material: non-woven+carbon; 2) Layer:; 4ply; 3) Free of maintenance; 4) Protect against dust ... alexible band: fixed easily, more comfortable and durable.Maintenance-free, hygienic, clean, environment friendly. It’s ... sanitation, paint industries, automobile manufacturing, etc. Item name industrial dust respiratorItem No. CFD2002TLayer 4plyColor blackPacking 20pcs/box, ...