Features: 1.Material: Non-woven and meltblown fabric, 4-layer filtration 2.Custom-Fit nosepiece conforms to the contours of your face to provide a comfortable 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 be careful and stay safe. Hope You All The Best Notice: The actual color may vary slightly from the picture due to the different monitor and light effect, please allow 1-3cm differs due to manual measurement description: 1. Material: Non-woven fabric 2. Mask style: Hanging ear type 3. Feature: Anti-Smog, Dustproof Includes: 100pcs X Face Mask