DIY masks are ideal for most of us, in that super-rare moment when we must go out in public: http://blog.japanesecreations.com/no-sew-face-mask-with-handkerchief-and-hair-tie
Have a plan for sanitizing your mask in your home quarantine zone, NOT the clean area of your home. Shoes, masks, goggles etc. all must stay outside of safe zone.
Some clever folks keep a rice cooker in their garage or on their back porch for sanitizing. They use it to steam masks, then hang dry for re-use. 10 minutes of full steam, minimum.
Cotton T-shirt fabric is pretty good for DIY mask-making: https://smartairfilters.com/en/blog/diy-homemade-mask-protect-virus-coronavirus/