Dust Mask price FFP3 NR D dust valve with structured valve 1. Our products have high filtration efficiency, non-woven cotton, soft to the skin, no allergens and odorless. 2. Our masks can make the face and nose comfortable. 1. Our products are high-efficiency non-woven cotton, which is soft to the skin, free of allergenic substances and odorless. 2. Our mask can make the face and nose comfortable. 3. FFP3 NR D dust masks can be used in industrial operations: construction, operating machinery dust masks, used to produce fiberglass, cement or planed wood. In addition, it can be used for garden work and daily house cleaning. 4. Dust mask with valve can breathe and speak freely.Dust Mask price website:http://www.shengnuo-medical.com/face-mask/dust-mask/