5 layers of protection: 5 layers of protective material filters can effectively prevent protection against air pollution. Enough quantity: Comes with 60 PM2.5 activated carbon filters, disposable items cannot be washed. Last long: The filtration effects can last a long time due to their special construction. It is usually recommended to replace the filter once a week. Applications: For use with a mask for dust protection, vehicle exhaust, PM2.5 protection and haze protection. It is suitable for cycling, running, biking, hiking, skiing and other outdoor activities. Description: Material: fleece Size: about 12 * 8 cm / 4.7 * 3.1 inches Supplied with: 1 piece of activated carbon filter Warm tip: The mask filter replaced the following steps: first Open the mask to expose the inside of the filter valve. second Turn the valve counter according to the OPEN instructions on the valve to disconnect the valve. 3rd Remove the filter. 4th Replace the new filter and repeat the steps above. Turn the valve over.
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