Universal Half Face Guard:  . These could effectively protect you against dust, fog haze, splattering liquids or mists, and anti-odor. Elastic Ear Loop & Adjustable Nose Clip:  The anti-pollution mouth cover with the elastic, adjustable earloop strap, it is comfortable to wear and not easy to slip. The adjustable nose clip could help you to secure the face cover in place. Safety Protection: The reusable washable face cover could help you to protect against dust and splashes. And it will stop you from touching your face. Reusable and Widely-Used: The face protector is made of a fiber mesh that is over the top of the filters. You could wash material and it dries quickly. Ideal for cycling, riding, hiking, running, gardening. Low Breathing Resistance: Rapid exhalation valves with a plurality of holes, double air breathing valve, offer maximum ventilation without sacrificing filtration. And it is very easy to replace the activated carbon filters.