Features: 1.material: Non Woven Fabric And Meltblown Fabric, 4-layer Filtering. 2.custom-fit Nosepiece Adjusts To The Contours Of Your Face To Provide An Enjoyable Fit. 3.flexible Fit To Ensure A Soft And Comfortable Fit. 4.do Not Recommend Using Them For More Than 48 Hours To Ensure The Best For Your Safety. 5.please Take Care And Stay Safe. Hope You All The Best. Notice: actual Color May Be Slightly Different From The Image Due To Different Monitor And Light Effect please Allow 1-3cm Deviation Due To Manual Measurement. Description: 1. Material: Non-woven Fabric. 2. Mask Style: Hanging Ear Type. 3. Function: Anti-smog, Dust-proof.