I use a gator type mask -

https://www.amazon.com/gp/product/B088ZYTSKK/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1

because I find it easier to manipulate it over my face, but because it doesn't actually filter anything I attach a piece of hepa filter (from a vacuum cleaner bag) with clips inside the gator.
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Brian Brandt