Mask Material : Outer layer : water resistant non-woven fabric, filter large particles Middle layer : melt-blown fabric, high efficiency filter, stop smallest particles, barrier to germ Inner layer : soft comfortable, resists moisture, skin-friendly absorbent non-woven fabric Soft comfortable elastic ear loop to safely hold and secure mask Adjustable nose clip Mask size : 17.5cm x 9.5cm Package option : boxed or bagged Package : 50pc/box or 50pc/bag, 2000pc/carton Carton size : 53 x 40 x 36cm, G.W. 9kg Style : nose and mouth mask, 3 layer, earloop, flat Minimum order quantity : 100 pc CE certified, good quality Non-medical, non-surgical, disposable, one time/single use, for daily use by common people Complies with China daily protective mask standard GB/T32610-2016 Particle filtration efficiency (PFE) 90% Low breathing resistance