This is what I have ordered twice. They are about 2 dollars per mask on Amazon right now. They are very comfortable but still have a nice tight fit.
HUHETA KN95 Face Mask, 30 per pack
The
Huheta KN95 Face Masks are one of the mask models approved by the
Food and Drug Administration for emergency usage. (You can find them under the manufacturer Dongguan Sengtor Plastics Products Co. in the non-NIOSH approved respirators category.) Made up of five layers — including two non-woven outer layers, two melt-blown layers, and one moisture-absorbing cotton layer — the masks can filter up to 98 percent of airborne particles, from dust to droplets. Each one comes individually wrapped and has a nose clip and soft earloops.