Reusable Washable Anti Pollution Face Mask PM2.5 two Air vent With Filter UK STOCK AND DISPATCH.HAND WASHABLE. NOT MACHINE.Key Features:Replaceable activated carbon filter consists of five layers of non-woven fabric and activated carbon microfibres, which can filter out 95% exhaust gas, pollen, dust, chemicals, particles and smokeDouble air valve and breathable ventilation design improves air circulation, helping to reduce moisture build up inside the maskIncludes one replaceable filter (Fitted to mask) and additional carbon filters can be purchased separately;The flexible nose clip can be adjusted and the ventilator can be perfectly adapted to most face shapes;Multi-Use - can be used whilst gardening, cycling or for season allergies and workplaces;Universal sizeWashable and ReusableReusable Face Mask Suitable for running, cycling, hiking, skiing, crafts, gardening, anonymity and other outdoor activities, such as tourism, hospitals, public places. Suitable for children, elderly, pregnant women, women, men, teenagers, etc. Steps to replace the mask filter: 1.Open the mask to expose the interior of the filter valve. 2.According to the OPEN directions on the valve, turn the valve counter(clockwise) to separate the valve. 3.Remove the filter. 4.Replace the new filter, reverse the above steps with clockwise rotation of the valve to close. Attention: The Face Mask itself is washable while filter pads are not.