Colbiz Face Dust Mask Reusable Washable Dust Mask with Breathing Valve 4 Filters Sport Mask for Woodworking Cycling Sports Running Black

Mask Specifications: Material: Nylon and Spandex Function: Windproof and Dustproof Season: Spring, Summer, Autumn, Winter Nose to chin length: 6 1/3 inches Adjustable band Size:5.2 inches Nose to rear: 13 inches Mask Occasion: Suitable for running, cycling, hiking, skiing, crafts, gardening, anonymity and other outdoor activities, such as tourism, hospitals, public places. Suitable for children, the elderly, pregnant women, women, men, teenagers, etc. The steps about how to replaced the mask filter: 1.Open the mask to expose the interior of the filter valve. 2.According to the OPEN directions on the valve,turn the valve counter(clockwise),to separate the valve. 3.Remove the filter. 4.Replace the new filter, reverse the above steps, clockwise rotation of the valve. Attention: 1. Mask is washable while filter pads are not, and it is advisable to replace a filter pad after using it for 7 days. 2. Please insert filter pad into mask in the same way as shown in picture before. Package: 2 *Dust Mask (Included 1 filter) 4* Extra Filters