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A nose filter or nasal filter is an air filter designed to fit inside the human nostrils to prevent the nasal inhalation of allergens, pollutants, and irritants such as dust, smoke, and foul odors. They are generally not intended for protection against toxic or injurious materials such as asbestos.
The filters are available in various sizes, and typically have a center clip to facilitate insertion and removal. They are made in a variety of colors. Some designs incorporate an adhesive tab.
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