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Layer activated pack sports cycling face and other valve day USPS from USA day handling.Buy or more save on order! FeaturesGB2626-2006 filtration efficiency PM2.5 to 0.3 micron particles pollen, and smoke. particles at efficiency through layers: Waterproof nonwoven polypropylene, anti-odor activated cotton prefilter, electrostatic particulate filter, waterproof nonwoven outdoor such running, and lawn lasts 3-30 days on pollution level. mask is and lasts 1-2 of daily use.100% not satisfied with to return 30 a full refund.
Replacement InstructionsReplace after days of on pollution when the layer turns exhaust counterclockwise unlock.
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