I use these masks for doing construction and yard work - great for stopping dust and mold and pollen from getting into my lungs. As such, I'll reuse these masks until they're hard to breathe out of - I can get a handful of wears out of them before I notice an issue. However, while they're fairly comfortable, the straps are often a weak link - the band will snap, making me replace them early. This is especially the case when I'm moving my head, such as if I'm contorting around in the attic or crawlspace.
Rating:
[4 of 5 Stars!]