Tag Archives: fleece

Fleece neck gaiters and bandanas are least effective at stopping COVID-19 droplets, study finds

Article content continued A laser beam is expanded vertically by a cylindrical lens and shined through slits in the enclosure. The camera is located at the back of the box, a hole for the speaker in the front. The inset shows scattering for water particles from a spray bottle with the front of the box… Read More »