Protect Your Health: Each Filter Is Crafted With 5 Layers, Contains Activated Carbon, Anti-sticking Cloth, Two Layers Of High Efficiency Filter Cloth. 2pcs PM2.5 Carbon Filters Will Come With Every Cotton Mouth Masks. Protecting From Dust, Pollution, Vehicle Exhaust, Sandy Air, Passive Smoking, Etc. Adjustability: Humans Are Not All Built The Same, Our Handcrafted Mask Comes With Adjustable Ear Straps And M-shaped Nose Clip To Fit Better A Variety Of Faces. Our Unique Nose Clamp Helps Our Air Filter Mask Fit Better And Increase The Sealing Effect. Give You The Most Comfortable Experience And The Most Secure Guarantee. Easy To Use: Easy And Not Need Much Time, Just Insert The Filter To It. Cares For Your Skin Keep Fresh Recommended Replacement Of 1~2 Times A Week.