This definitely works better than a regular bandana. You really notice the difference when passing through long tunnels or when you are stuck behind a big truck in slow-moving traffic, especially in the heat of summer. I've only given it four stars because it can sometimes be difficult to keep in place around your mouth and nose when wearing a jet helmet. If you tie it too tight it tends to press uncomfortably against the end of your nose. Too loose, and it will move around and not keep all those traffic fumes out. It does take some getting used to, but works very well when you've tied it just right.