SUPOW&reg; Disposable Mask, Activated Carbon Prevent Mist Haze Car Exhaust Smell of Cigarettes PM 2.5 Dust Filter Cycling Mask for Unisex Lightweight and easy to breathe through. Includes one Active Carbon Filters. Size: 15*15.5 At least 95% filtration efficiency against solid and liquid aerosols including oils. Superior Procedure Masks (Earloop) provides Comfort and Soft feeling. Keep the air you breathe from PM 2.5 Dust.