Dust Mask with Active Carbon Filters and Breathing Valve, Reusable and Washable Sports Mask, Comes with 6 Filters

Size Test: Please check the dimension before purchasing. Nose to chin length: 5.9 inches, Nose to rear: 13.9 inches The following are general guidelines based on the weight of 120lbs-200lbs. Please note that facial measurements can more accurately ensure proper wearing. How to Wear Properly: 1. Put the mask on the face, find the most suitable position between the bridge of the nose and the jaw. 2. Fix the mask by the velcro band on the back of the neck. 3. Adjust the nose clip to make it fit with your bridge of nose perfectly. Mask Specifications: Type: Quick Dry, Windproof, Dust-proof Size: One Size Theme: Outdoor Material: Nylon and Spandex Season: Spring, Summer, Autumn, Fall, Winter, Year-round Key Feature: The breathable, durable and comfortable nylon and spandex materials The adjustable nose clip and a velcro band to match your size Double air valve to breathe smoothly and keep the inside dry The replaceable filters of 5Layers protection The 95% activated carbon layer to filter out PM2.5 Package contains: 1 x Dust mask (a filter included) 6 x Filters The Steps to Replace the Filter: 1. Unfold the dust masks 2. Open the valves according to the "OPEN" direction 3. Remove the filter and valve 4. Replace the new filter, and then clockwise rotate the valve to fix the filter