Coxeer Dust Mask, Motocycle Mesh Cover Dust Mask Half Face Bike Mask for Outdoor Activities Nylon Size of the dust mask is 13 x 6.7", larger than others' mask, one size fits most adult with velcro fastening. Coxeer anti dust mask is shock-proof, can help u keep out the bridge of your nose the following part with aluminum sheet fixed according to the person face design. With unique ventilation design, a plurality of holes, excellent permeability, exhale, the valve of work out mask is opened without resistance, double air breathing valve, air resistance is smaller, smooth breathing. Our cool dust mask is suitable for cycling, hiking, skiing and other outdoor activities, also can be used as haze day protection, anti-dust and so on. This riding dust mask is washable if it getting dirty. Attractive appearance of our protective face mask is simple and lightweight.