The Moldex 2200 N95 is a disposable particulate respirator, often referred to as a dust mask, with unique plastic mesh outer shell. Holds it"s shape better than any other on the market. Fold it up in your pocket when not in use, it springs back, good as new. When laying down on a surface, mesh holds dirt away. Mask stays cleaner longer. No need for metal nose clips or elaborate face seals. Fits most people just right. All these features add up to value over the life of the mask. Packaged and sold by the box of 20.