Feature: Adopting high transparent, medical-grade FDA-approved material and according to the medical device manufacturing standard to manufacture, which is safe and quality guaranteed. Using low resistivity and electrostatic compound filter to get high-performance filtration effect. With invisible effect design, which will be more convenient and beautiful to wear. Designed according to the natural shape of your nostrils, which is very comfortable to wear. It can filter the haze, dust, exhaust, smoke, virus to give you a free breathing environment and away from the air pollution. Offers relief from nasal allergies, allergic asthma, rhinitis, and sinusitis. Double filter give you double protection. Specification: Condition: 100% New Filter Material: Ultrafine Fiber Filter Frame Material: TPE Optional Frame Diameter: S: 8 mm / 0.31 inch M: 9 mm / 0.35 inch L: 11 mm / 0.43 inch Quantity: 1 Pairs Of Nasal Filter Frames + 8 Pairs Replacement Filters Applicable environment: 1. The air quality of light pollution to the above weather, such as haze, dust and so on. 2. Living in the dust, pollen, catkins and other small allergens-intensive environment. 3. Long-term in the dust and other particulate matter-intensive places, such as production plants, construction sites, etc. 4. House decoration, smoking places, cooking and so on. 5. Public transport, subway, railway stations, bus stations, shopping malls, hospitals and other personnel-intensive public places. Instructions: 1. Tear apart the product aseptic sealing layer along the inner packing label. 2. Remove nasal cavity filters, the letter side toward the face, distinguish the left (L) / right (R) nasal cavity. 3. Put the the filter into the nasal cavity, adjust the best location through the nose breathing. Please ensure the correct wear to achieve the best protection and stealth effect. Package Include: 1 x Set Nasal Filter Notes: 1. Not edible, please put the place that children can not touch. 2. Not suitable for children under the age of 6 use. 3. Do not force or long-term extrusion product shell, to avoid structural deformation affect the filtration effect. 4. The filter can be long-term use, but when the filter was significantly changed color and respiratory resistance increased significantly when the time to buy, replace the filter, filter pollution is not recommended when the cumulative use of more than 10 hours. 5. Do not try to clean the internal filter and then use again 6. If there is difficulty breathing, nosebleeds, runny nose and other discomfort reactions, please stop using immediately. 7. The first use this product if has a slight discomfort (such as swelling) is a normal phenomenon, a short time to adapt to the nasal cavity. 8. The internal portable small box by pressing the bump position and finger open the lid. 9. Please place in a cool dry place, avoid direct sunlight 10. Monitors are not calibrated same, item color displayed in photos may be showing