Professional Protective Mask with high filtration.   (breathing valve)·          Approved quality standards, efficient filtration of PM 2.5.   The exhalation layer reduces heat build-up and exhalation resistance inside the respirator to make it easier to breathe and help keep the wearer more comfortable. ·        Perfect for travelling through busy, public environments such as malls, markets, offices, public transportation and more. Idea for both indoors and outdoors. ·        Bacteria and dust filtration efficiency is ≥ 95%: made of quality activated carbon, non-woven and melt-blown filter cloth, which effectively filters out 95% of bacteria, exhaust, pollen, smoke, dust, chemicals, particles and fumes. ·       5 Layers of filtration and protection: 1st layer of cloth filters micron-level dust. 2nd layer filters industrial pollutants, automobile exhaust, passive smoking, and pollen allergens. 3rd layer of active carbon cloth filters micron-level dust. 4th layer offers filter density for smaller material. 5th layer of cloth filters out all kinds of harmful substances. ·        Comfortable Wear: High-quality elastic ear bands makes it quite easy to wear and comfortable for long periods of wearing. Customised facial design, 3D stereo tailoring, good fit and breathability·        Package Content: 10 pcs.