SOFT COTTON FABRIC: Our mouth cover is made of soft cotton, it is breathable and comfortable to wear. Suitable for men, women and teenagers. ADJUSTABLE NOSE WIRE & EAR LOOP: Comes with an internal metal liner to form fit the face where the nose is. It is adjustable to suit each person's nasal profile and make a better fit. And the elastic ear loop can be adjustable to fit most people. DUAL PROTECTION: Back opening design, a replaceable insert can be put into it to make protection more effective. (It is recommended to replace 1~2 times a week) WASHABLE & REUSABLE: High quality cotton fabric, it can be repeatedly washed and they are reusable for many times. MULTIPUPOSE: Great for outdoor activities such as shopping, cycling, walking, hiking, jogging, running, skiing, snowboarding, skateboarding, scooting etc.