Leeko Anti-dust Anti-Pollution Mask,Half Face Ski Snowboard Bike Motorcycle Cycling Mask - Free Size Velcro adjustable size,suitable for most people to protect the face Face Shape Design, Nose portion of an aluminum sheet secured to prevent slipping Protection of the face,the material is soft,comfortable to wear Mouth have ventilation holes, the magic stick fixed. Suitable for cycling, hiking, running, skiing and other outdoor activities