[FFP3 series YXP311 with valve] 1. Ear band, good elasticity cotton headband. 2. Filter material, high-efficiency, free and smooth breathing. 3. Fit face shape. 4. Disposable, soft, comfortable. 5. Application: hospital, clinic, medical users, doctors, patientl and etc... 6. Auto Manufactured. [standard: EN149:2001 + A1:2009 FFP3 NR] material: 4 layers, outer layer 70g/m2 non woven fabric, middle 2 layer 30g/m2 Melt-blown fabric inner layer 50g/m2 non woven fabric [box size: 18x14x21CM carton size: 72x37x44CM 30 pieces/ box 600 pieces/ carton G.W.: 12.2 KGS] [OEM orders & ODM orders are welcome.] CE certificate & test report. White list in China Commercial Bureau.