Respro metro anti pollution mask made from neoprene the metro is machine washable and fastens without fuss at the back of the neck by velcro fastenings the metro is a comfortable fit is at the top of the range in the airwear collection featureseasy to fit active carbon filter low cost maintenance durable stylish velcro fastening filters out exhaust emissions fits without fuss and fully adjustable washable ensures correct fit for adults for urban use cycling motorcycling walking buy resp