This dust mask can be used when cycling and other outdoor activities to prevent you from dust， sand， bionfly and even sunshine.<br><br><strong>Features:</strong><br>Low resistance. Unique ventilated design and double air valve help you breathe easier and freely when you are riding bike.<br>Ergonomic design， fit face perfectly.<br>Adjustable fastener tape， you can adjust the mask freely according to your demands.<br>Neoprene fabric material， soft and comfortable.<br>Activated carbon filter piece can filter out 95% dirt.<br>Cool patterns.?<br><br><strong>Specifications:?</strong><br>Fabric: Neoprene<br>Applicable gender: Unisex?<br>Item Weight: 40g / 1.42oz?<br>Package Size: 16 * 20cm / 6.3 * 7.9in?<br>Package Weight: 50g / 1.8oz ?<br><br><strong>Package List:?</strong><br>1 * Face mask ?<br><br><strong>Note:</strong> Please allow 1-2cm (0.4-0.8") differences due to manual measurement， thanks.