cotton face for running,traveling,cycling washable reusable warm windproof springseaon <p>activated carbon face mouth masks can effectively block haze, industrial emissions,cigarette smoke,vehicle exhaust other harmful gases in the air, protect human health.they are suitable to wear when going outside, shopping, cycling,skiing, jogging, bus,hospital, subway etc.</p> <p><strong>specification</strong></p> <p>product weight: 18g</p> <p>material: cotton</p> <p>package includes:1 x cotton mask, 2 x adjustable rubber ring,4 x activated carbon filter</p> <p><strong>material characteristics</strong></p> <p>1.cotton fabric,comfortable and soft</p> <p>2.breathable,washable and reusable</p> <p>3.the length of widened and high elastic earband can be adjusted at will</p> <p>4.each mask with 4 pieces of activated carbon filter should be replaced once or twice a week</p> <p><strong>how to use</strong></p> <p>1.open face mask insert one activated carbon filters</p> <p>2.cover your nose and mouth with a mask</p> <p>3.adjust the buckle on both sides of the mask to the best position</p> <p>4.adjust the nose clip to fit your nose</p> <p><strong>matters need attention</strong></p> <p>do not put it in the washing machine with other clothes.children under 3 years of age have low vital capacity and are not recommended for use.</p>