As an electrician specializing in remodel work, I have to crawl through a lot of insulation and dusty crud. This mask stops all kinds of airborne insulation fibers, as well as fine dust. This thing has saved my lungs for sure.

We live in a dusty area, and some of our employees (nature lodge) arrive by motorcycle. These were purchased for them, to save them a face full of dust on the way to work. The masks work great and employees happy and healthier!

I haven't used mine for ATVing, and don't believe I will. It is very uncomfortable. I got some neoprene ones as well and was much happier with the comfort of the neoprene masks. The materials are good (only reason I brought it up to two stars) but it pulls down on my nose hard and is very uncomfortable.

If you are wearing a dirtbike helmet with goggles, this mask is a good choice. If not, there might be better masks you can use. This mask fastens low around your neck so it does foul with the helmet. Also, the nose part does not come up so high that it interferes with goggles (a problem with other masks I've tried). It is not 100%, probably due to leaks around the edges, but it cuts 90% of fine dirt that my lungs don't need to see. I was afraid it would be too hot and suffocate me, but as long as you're moving, it's OK. My complaints are that the neck cover does not deploy like in the picture (it just bunches up on me) and the strap should have more adjustability (i.e., more Velcro) so it could be made tighter. I still like the 90% filtration I get and will continue to use it for dusty riding. It cleans up pretty well with hand washing.

Poor design.

To the designers:
The mask you've created is held in place by a single strap around the neck.
The distance between the nose and the back of the neck changes as the head moves. You may not know this from sitting at desk and staring at a screen.
Yes there is some elasticity in the strap but not enough to allow for the neck and head to move without a headache.
I cut a strip of a flat bike tube and stitched it on as a band that went from the lower jaws of the mask up on top of the head.
The distance between the nose and the top of the head doesn't change.
Do some research and look at a simple dust mask from a hardware store. Lots of elasticity in two bands.

Another very amateur mistake you made was with the Velcro... You put the hook side facing the neck.
So if there is any bit of the hooked side of the Velcro not attached to the loop side, you'll have a chaffed neck.

I bought two and wished I had just bought some cheaper dust masks from the hardware store.