Just got mine today in the mail. Pretty awesome product. Has a filter on the inside that provides easy breathing and filters 99.9% particals in the air.
Good for mowing the lawn, Riding ATV's on dirt roads, or Scent Prevention from your breath while hunting. They come in tons of colors/styles/sizes.
I have really bad alergies and mowed the whole lawn today with not a single problem.
Going to be my hunting mask being as I picked up the mossy oak color. Check them out, I really like it. Pretty easy to breath in to, easier then you'd think.
http://rzmask.com/