Features: - Permeability is good not boring. It can achieve dust effect. Aluminum strip nose bridge can be fixed paper. No ultra sealing particle, comfortable wear. Uses the best ultra-soft cotton and skin-friendly cotton with depth optimization and enhancement, which is soft, pliable and breathable, ideal for people with skin sensitive allergies. Use our anti-pollution kid mask can reduce the risk of breathing gases, harmful odours, pollen, smoke, dust and other harmful particles, for hospitals, schools, travel, cleaning, painting, construction, outdoor activities. Meet your different needs - whether you work, running, city driving, home clean or outdoor activities, you will immediately have the best protection for your health. We are sure that 100% of our products have been checked strictly and in good condition before we send them. We will try our best to avoid any quality problem. We will always here to solve any of your problem. Package 1: (2 mask + 30filters) Package 2: (4 masks + 100 filters) Package 3: (4 masks + 200 filters) Package 4: (4 masks + 200 filters) Mixed colour