<br><strong>2pcs Washable Reusable Nylon Face with 4 Carbon Filter and Breathing Valves for Outdoor Sports Cycling</strong><br/> <br><strong>Note:</strong><br/> <br>Material: Nylon & cotton <br/> <br>Perimeter:the tensile length ranges from 20.5-26.8in</p> <br><strong>Package Contents:</strong> <br/> <br>2 x Anti Dust covers<br/> <br>4 x Activated Carbon Filters<br/> <br>Perimeter:the tensile length ranges from 20.5-26.8in</p> <br>Combining colors：pink+black/2pcs black/ wine red +blue/purple+black<br/> <br><strong>Features:</strong><br/> <br>-Adjustable nose clip ,perfect fit, cut off the air<br/> <br>-Double breathing valve,enhanced ventilation function<br/> <br>-Soft and breathable, mesh structure can maximize breathability<br/> <br>-Double strapping system ,ear loop and Velcro can be adjusted at any time, suitable for most head shapes<br/> <br>-washed and reusable, it can effectively prevent dust, pollen, pollution, etc.And keep you healthy.<br/> <br>-Replaceable filter, it can be replaced by disassembling the breathing valve. It is recommended to replace it 1 to 2 times a week<br/>