Name:Disposable 3-Ply Nonwoven Face Mask Standard:GB2626-2006 (Quality Standards of China) / Non-Medical Material: 1st layer: 25g non woven fabric; 2nd layer: 25g melt-blown fabric;3rd layer: 25g non woven fabric Particulate filtration efficiency(PFE): >90% Layer:3 layers Size:175 x95mm (5mm) Type:Ear loop Color:Blue/White Packing:50pcs/box\bag, 2000pcs/carton Usage:Protection from particles such as those from Virus, Grinding, Sanding, Sweeping, Sawing, Bagging, or other Dusty Operations. Advantage:Low breathing resistance with high filtration efficiency. Nonwoven laces to tie and fix the mask on face easily. Economic price for disposable use. Warranty:3 years from production date with well-packed and room temperature.