UW–Madison Professor Scott Sanders’ team modified a mannequin so that the mouth releases a puff of air containing fog. The air speed is similar to a real human cough, but there is much more fog than an actual cough. This condensed video looks at how well masks contain the fog, using regular lighting and laser lighting, and shows results from testing different mask styles. Watch the full video here.

Coupling function with fashion, cloth and home-sewn face masks are available in a variety of forms and fabrics. While experts underscore that wearing a mask is effective in helping to prevent the spread of COVID-19, not all masks — or the materials with which they’re made — contain virus particles equally.

In a new video, University of Wisconsin–Madison engineer Scott Sanders demonstrates how droplets from a cough escape from or remain inside masks of varying styles and materials. More