The Mask Is Very Soft, Breathable, Water-Repellent, And Washable. The Buckle Can Be Adjusted To Adjust The Elasticity. You Can Change Its Length According To Your Facial Contour To Prevent Leaving Marks On Your Face After Taking It Off. This Mask Can Replace The Filter. It Can Protect Your Face And Lips.As Shown In The Picture, There Are Two Masks With Different Patterns And Two Replaceable Filters.