FakeFace Bike Cycling Anti-dust Half Face Mask with Filter Neoprene Added Activated Carbon Filtration Layer One size fits most High quality Anti-pollution bicycle cycling face mask mouth-muffle with filter Superior, well-sheathed, flexible metal Nose-bridge Clip - helps to mold mask to nose and face contour Replaceable filters and exhalation valves to keep the inside of the mask well ventilated It is ideal for the use when riding, skiing, and other outdoor sports.