Material: Made Of 100% Polyester, Very Comfortable And Easy To Wear. Accessories: Equipped With Two Activated Carbon Filters, Replaceable 5 Layers Of Protection, M-shaped Nose Clip Performance: Very Soft, Breathable, Washable, The Elasticity Of The Buckle Can Be Adjusted, And The Length Can Be Changed At Will According To The Contour Of The Face To Prevent Leaving Marks On The Face After Taking Off.