Homemade and non-medical masks have grown in popularity with the PPE shortage around the world. There is no proof that masks effectively protect the people wearing them, can but they can be worn as an additional measure to protect others around you.
“These types of masks may not be effective in blocking virus particles that may be transmitted by coughing, sneezing or certain medical procedures. They do not provide complete protection from virus particles because of a potential loose fit and the materials used.”
ーGovernment of Canada
Canada Health. Considerations in the use of homemade masks to protect against COVID-19; Notice to General Public and Healthcare Professionals. Last update April 19, 2020.