Product Name: Particulate Respirator Dust Masks Disposable Anti Pollution Mask with Exhalation Valve Model NO.: mask Material: Non Woven Fabric MOQ: 1000PCS Transport Package: 50PCS a Bag Origin: Zhejiang, China Product Description Product Descriptionat least 95% filtration efficiency against certain non oil based particles and aerosols, effective protection against dust, car exhaust, pollen, etc. Suitable for adults and children, indoor or outdoor use.* 4Layers Design -- The outer 2layers are non-woven fabric: effectively block the saliva. The inner 2layers are meltblown cloth: filter non-oily particles in the air.* Adjustable Nose Clip and Elastic Earhook Designed -- Nose Clip: fix nose bridge position, Elastic Straps: help mask does not fall off and make you breath easier. Elastic and soft ear loops eliminate pressure to the ears, make it comfortable to wear for along time.* Package including -- 3PCS Safety Masks. If you have any questions, please email me at any time and We give you answer.