ACF face mask is made by activated carbon fiber, which can absorb and filter effectively. It is the best choice for doctors, nurses, patient and also good for the staff in chemical spray dying industry. Structure: Four layers: inner layer and outer layer are made of soft Polypropylene (P. P) which reduces the fiber falling and increases comfort for wearing. The filter layer is made of high-efficient melt blown cloth which resists dust and oil-free particle. And also one of layer is activated carbon fiber felt. Properties: 1. High efficiency and low breathing resistance 2. The bridge of the nose part can be adjustable. 3. Built-in foam pads at the nose part are suitable for all kinds of face with comfort. Suitable to long time wearing comfort. Cool latex-free cloth head straps for comfortable wearing. 4. Breathing valve reduces hot air inside and makes wearers breath easily in hot/humid environments. 5. A perfect protection against toxic particles, an efficient adsorption and removal of organic gases and odor. Usages: Suitable to chemical agriculture, solution cleaning, spray, printing, electronic, food processing, auto body shop, ship building. Ink and dyeing. Sterilizing, workshops, etc. Varieties: 1. 8 /9 -layer gauze ACF mask 2. Cupped ACF mask 3. Disposable mask 4. 3-layer/2-layer non-woven cloth face mask 5. FFP1,FFP2, N95, N99 Note: Can be used for about 8 hours to protect the wearers from particles and dust well and also can micro-filter some acidic particles at the same time but can not be used in protecting the gas. If you want this role, please choose our half face gas mask or gas mask.