This cycling mask is a great cycling accessory for anyone who enjoys cycling or just going for a run. The product is also made of a comfortable and durable material.
Usage for the filters
Recommended to be replaced every 1-2 days in the special time ，if go to a place that was heavily polluted or crowded, please replace filter soon. ( In the absence of pollution , the filter can be used for 30 days, but if it is found that the filter becomes darker, it must be replaced in time. ）