Table 3. Overview of limitations and benefits of this study.

Benefits	Limitations
Model includes face and airways	Particles <0.3 μm and >10 μm not measured
Approach translatable to other face models, masks, etc.	Single, highly idealized model
Clinically relevant particle sizes	Exhalation non-cyclic, mouth only, single low flow rate without temperature control
3D printing allows for personalization	High aerosol concentration
Broad range of positions evaluated	N95T unable to undergo OSHA standard fit testing