100% PolyesterMaterial description: 100% polyester fiber (polyester)Product Performance Very Soft, Breathable, Washable, Adjustable Tightness With Button, Can Protect Your Mouth And Face From Dust, Cold, Dust, Pollen, Allergy, Fog And Haze, Exhaust Emissions, Passive Smoking, EtcIdeal to protect your mouth and face safe by keeping dust away. Our mouth mask is also a good match for outdoor, indoor, bus, metro, hospital, sporting, running, hiking, daily use and so ontake This Bold Fashion Accessory Everywhere: Folds And Fits In Your Pocket. Will Even Fit In The Extra Tiny Front Pocket. New Design Can Make You More Attactive And Charmful.Protect Your Health: Each Filter Is Crafted With 5 Layers, Contains Activated Carbon, Anti-Sticking Cloth, Perfect For Running, Cycling, Camping, Shopping, Daily Life And Outdoor Activities.After Sales: If You Have Any Questions About The Product You Received, Do Not Hesitate To Contact Us. We Will Solve It For You Within Hours.