Outdoor tactical protective mask Multi-functional breathing valve mountain riding mask windproof dust anti-smog safety mask

2: Use Velcro to fix the back of the mask

3: A malleable aluminum nose clip is installed on the bridge of the nose, which can be adjusted according to the different face and nose shape of each person, suitable for various face shapes, high density

4: Check if it is suitable, cover your face with your hand and breathe hard to see if the air can flow 5: Adjust the tightness of the mask up and down by adjusting the Velcro at the back