?Professional Protection?USE--- PLEASE CHECK SELLER FEEDBACK BEFORE PURCHASE. Make sure you are buying from Besungo Products for AUTHENTIC. The dust mask is made of high-quality mesh fabric, lightweight, soft, skin-friendly, breathable, comfortable. When the nylon mesh and valve become dirty, you can use clean water and a small amount of alcohol to soak for 5 minutes and then clean them. ?Five Layers Protection?The replaceable filter has a 5 layer structure, and the inner meltblown cloth is the main factor to protect your health. The sports mask is specially designed for harsh environment. It can effectively resist more than 95% harmful substances and protect your face from dust, pollution, ash, pollen, allergy, haze and smoke ?Adjustable Size to Fit? This adjustable face mask has 2 ear loops, which can fix the mask on your ears. The Velcro on the back can be adjusted according to your face shape, making it more comfortable and safe to wear. In addition, our ergonomically designed V-shaped aluminum nose clip seals the mask around the nose, which can prevent blurred vision caused by hot mist covering the glasses and damage to the eyeball caused by heat. ?Breathable Design?The breathing mask includes 2 one way valves to make it easier to exhale heat, water vapor and carbon dioxide. It is ideal for long-term wear and is perfect for house decorating, cycling, running, biking, hiking,woodworking and other outdoor activities. ?Worry-free Guarantee? We provide no-reason return service for all products. When you encounter a non-returnable situation, please feel free to contact us. We will reply you within 12 hours and give you the most suitable solution according to your needs, ensuring that your problem is solved in the most perfect way and giving you the best Pleasant shopping experience