How do I put on a strap-back pollution mask?

active carbon filter, check
Step 1. Check to make sure valves are tight
Active carbon filter, mask, nosepiece
Step 2. Hold the nose piece on top and open it wide
contains model with blue breathable pollution mask
Step 3. Place the mask right under your eyes and lower it onto your mouth and nose.
Step 4. Bring the strap (under your ears) around the back of your neck.
Step 5. Strap the Velcro together at the back of your head. Pull it tight.
Step 6. Then tighten the nose piece so that you can still breath through your nose, and you’re ready to ride!