3 layers;Outer layer: 100% Woven cotton;Mid-layer: Filtering non-woven fabric;Inner layer: Soft feel 100% Woven cotton;Reusable & washable at 60˚C. can be tumble dried;Allows easy breathing without restriction;Pocket for optional PM2.5 Activated carbon filter (PR797 sold separately);Remove any filter prior to washing;Secured with adjustable elasticated ear loops;Shaped to fit snugly on the face and under the chin;Bendable and adjustable ‘nose wire’ prevents glasses from “fogging”;Non-medical;Conforms to standards GB18401-2010B;One size fits all;Non-returnable;PR796 Information PDF;Mask Maszk Maske Masca Maska Masko Maska