I'm concerned by the promo picture on that website[1], that mask really doesn't look tight, and it only has one strap. There's a reason most N95 masks have two

I'm concerned by the promo picture on that website[1], that mask really doesn't look tight, and it only has one strap. There's a reason most N95 masks have two straps[2] and that's because a tight fit is essential for filtering particles in the surrounding air. Even a small gap between your skin and the mask will mess with the negative pressure expected to happen within the mask to force the surrounding air to pass through the filter when you breathe in (which, in the case of [2] is the entire mask). They might not look pretty but for anyone looking for a cheap and reliable mask, just get a regular N95 mask from a hardware store, it's used by carpenters etc. all the time to block particles and it works well for most car/truck pollutants. Of course it won't filter gases or whatever else cars emit that may damage your health. [1]: https://respro.info/images/v3_product_background/_ProductBackground/ultralight-mask-hero.jpg https://respro.info/images/v3_product_background/_ProductBac... [2]: http://wasip.com/wp-content/uploads/2014/12/W795110-P http://wasip.com/wp-content/uploads/2014/12/W795110-P