face mask with elastic band: 1) Material: non-woven+filter 2) Layer: 4ply ... very convenient and practical.Applications of face mask with elastic bandRubber, synthetic fur, metal casting, battery, building ... , automobile manufacturing, etc.Item name face mask with elastic bandItem No. CFD3001TFLayer 4plyColor blackPacking 20pcs/box. 40boxes/ ... : chiefdon.en.alibaba.com face mask with elastic band