Filter adapter for CPAP mask

Turn your CPAP face mask into a particulate-filtering mask.

I need an expert to tell me which kind of filter material is appropriate.

Currently using CPAP machine filters and MERV-13 A/C filters.

CPAP filters: https://smile.amazon.com/gp/product/B07FBWJZR5

MERV-13 A/C filter: https://smile.amazon.com/Aerostar-Pleated-MERV-13-16x25x1/dp/B01CR9JNGS

Update:
Added a photo with a full-face CPAP mask. The black tape around the base is to cover existing vents. Remember, CPAP masks are not sealed.

I got best results with PETG and a resolution of 0.1 mm, to really scrunch the layers together and prevent leaks.