Features Dust-proof, flexible and comfortable, adjustable nose clip Suitable for riding, running, daily leisure and other outdoor sports. Product Details Size : One Size Material : Nylon + Spandex Applicable : Cycling, Running, daily leisure and other outdoor sports Package : Package (20 * 14 * 4cm) About this product Healthy breathing:Active carbon filters isolate 95-percent of dust, chemicals, fumes and particulates. Smooth breathing:Unique ventilation design, excellent permeability, double air breathing valve, air resistance is smaller,smooth breathing. Fashion pattern design:Attractive appearance and is simple and lightweight. Comfortable fabrics:Diving fabrics, soft texture,comfortable to wear. Adjustable Velcro:Velcro neck design ingenious,the size can be adjusted to meet the most head type. 
