A specially developed mask to provide city cyclists with broad spectrum filtration against pollutionuses a dynamic activated charcoal cloth to filter the worst of urban pollutionincludes two techno valves to allow easier exhalation which is particularly important as they release heat water vapour and carbon dioxidecomes in two sizes with a contoured shape for a snug and comfortable fit and velcro pads for easy applicationmade from hypo allergenic neoprene giving a comfortable and secure fitthe f