dust mask, item# HF204; non-woven material; different weight are available; with 50pcs/ color box; dust mask, item# HF204; material: non-woven;weight available: 100gs, 120gs, 140gs, 160gs, 180gs,200, 220gs etc.disposable use, very convenient. packing information : box: 50pcs/ box; 20boxes /master carton; head card: 10pc/head card; 5pc/head card; blister : 10pc/ctn