March 29, 2020
N95 respirators are used by frontline healthcare workers. 3M is the main brand trusted by the hospitals. The other brands from South Korea, Vietnam, China and other countries are of varying quality and are much cheaper. These brands are sometimes referred to as non-medical N95 respirators or masks.
Members of the public generally do not need to wear them, but some do. A tourist at the Esplanade below is shown wearing the N95 mask. There is the exhalation valve. Prices are as low as $8.00 per mask in March.