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Blue silicone disc on the filter
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How do I assemble the Urban Air Mask?
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How do I clean the Urban Air Mask?
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How do I clean my Air Mask Lite?
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How often do I need to change filter for the Air Mask Lite?
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Size guide for Air Mask Lite
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Size guide for Lite Air Mask
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Tests & certificates for Lite Air Mask
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How often do I need to change filter for the Lite Air Mask?