Feature: Please note: other accessories are not included. 100% brand new quality Using highly transparent, FDA-approved medical materials, in accordance with medical device manufacturing standards, safety and quality are guaranteed. Using low-resistance electrostatic composite filter to achieve high-performance filtering effect. The invisible effect design makes it more convenient and beautiful to wear. Designed according to the natural shape of your nostrils, it is very comfortable to wear. It can filter haze, dust, exhaust gas, smoke, and viruses, giving you a free breathing environment, away from air pollution. Relieve nasal allergies, allergic asthma, rhinitis and sinusitis. The double filter provides you with double protection. Specification: Product name: Air filter for nose Specification: boxed Food grade silicone Size: boxed large size (11mm), boxed medium size (9mm), boxed small size (7mm) Material: Le Shuang Song hN filter Crowd: Family Pack Function: Anti-fog and dust, scene: factory/indoor/outdoor pollen, car exhaust pump: Applicable environment: 1. From light pollution to air quality in the above weather, such as haze, dust, etc. 2. Living in an environment where small allergens such as dust, pollen, catkins, etc. are dense. 3. Long-term use in places where dust and other particles are dense, such as production plants, construction sites, etc. 4. Home decoration, smoking places, cooking, etc. 5. Public places such as public transportation, subways, railway stations, bus stations, shopping malls, hospitals and other densely populated public places. Instructions: 1. Tear off the aseptic sealing layer of the product along the inner packaging label. 2. Remove the nasal cavity filter, with the letter side facing the face, distinguish the left (L)/right (R) nasal cavity. 3. Place the filter in the nasal cavity and adjust the best position for breathing through the nose. Please wear a suitable one to get the best protection and stealth effect. Notes: 1. Manual measurement tolerance is 2-5g. Please don't mind your substitutes. 2. Due to the difference between different monitors, the image may not reflect the actual color of the item. thank you very much! 3. SKU color is product color Package Included: 1 pair * nasal congestion (filter installed) + small storage box