I'm not sure I understand this comment. I don't know if this suit will really offer protection, but I don't see the problem with the choice of filter.

A HEPA filter has a stricter rating than the N95 masks that healthcare workers use.

"HEPA, which stands for High Efficiency Particulate Air, is a designation used to describe filters that are able to trap 99.97 percent of particles that are 0.3 microns"

N95: Removes 95% of all particles that are at least 0.3 microns in diameter