From the paper: "The mask's aerodynamic features may explain this finding. A turbulent jet due to air leakage around the mask edge could contaminate the outer

From the paper: "The mask's aerodynamic features may explain this finding. A turbulent jet due to air leakage around the mask edge could contaminate the outer surface." Agreed that calling it an n95 equivalent without any evidence might be a stretch though. And yes other papers looked at it with a seal. Still would be interesting to see a surgical vs. sealed surgical comparison.