An old bandanna might work, but if you really want to filter dust and pollutants from your lungs while riding, the RZ Mask ($29.95) has replaceable Active Carbon Filters to remove 99 percent of air impurities. Neoprene construction allows the mask to fit comfortably under helmets and goggles, while one-way valves expel condensation.
**(888) 777-9422
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