RZ Dust/Pollution Mask Bonus Pack w/5 Laboratory Tested Filters, Model M2, Mesh, Navy Blue, Size Large

This is pretty decent. It covers the face well, looks ok, and does come with all the spare filters.Breathability is good which is necessary for sports/when you're doing efforts.Now for the reason this is not 5 stars: the fixation system on the back means that the mask will slightly slip inherently over time. I can see why it's made that way - its a trade of between looking good, being easy to fit/remove, while still being functional.I suspect having some additional support within the tissue would help solving it though (the nose piece does have such a support for example).Overall, if you're looking for such a mask though, this work well, and is arguably better than the competition. I use it for commuting in the city.Finally, the benchmark are the 3M masks. This mask is more breathable with the default filters (it's impossible to do effort with the 3M masks without suffocating) - and looks much better, while providing a similar level of isolation (at least for my size of face/head/nose/etc).

Doesn't fit all that well on my nose. The parts that touch the face have a semi-rough seam and the strap ends up in the same place as my ponytail so I need to have a super high and tight ponytail to wear this.

Way more comfortable than the paper disposable masks! I also don't feel like I have to try harder to breath or am out of breath after wearing one for an extended period of time like the cheaper masks.

Bought it for the wife to wear in the RZR, after she got the adjustable nose piece dialed in she loved it👍🏼

Absolutely horrible. Breathability is beyond bad to where I have to take off every minute or so in order to catch my breathe and stop from passing out. Each exhale seems to come up by the nose, immediately fogging my safety glasses. What a ginormous waste of $40. I think I'd rather get lung cancer than wear this again.