Experienced woodworkers have a quick/cheap trick for making a mask from old t-shirts. They do it to filter out sawdust, but this how-to technique works equally well for DIY masks suitable for wearing at the grocery store during this coronavirus pandemic.
Note: This DIY Face Mask Is Not Medical Grade
This how-to DIY mask is far from medical grade. The virus can still pass through and around the fabric. However, it will halt the spray from your inadvertent sneeze or cough. Most importantly, this is a mask that will signal to others that you are taking the pandemic and everyone’s health seriously. It also fits nicely into your pocket or bag.