Pros of this pattern:
Comes in adult and child sizing
Very fast and easy, uses one rectangle of folded cloth
Casing for ties makes this pattern even quicker no more fussing about sewing them in
Superior nose wire (optional)
Includes ironing guide for mass production
Can be used as an N95 cover, or alone as a mask with a filter
Shaped chin can be added
Uses less fabric: 27 masks out of 3 yards!
New revised pattern!
See Tri-State Mask Making group slideshow for a more thorough discussion
Cons of this pattern:
Must use with filter for solo use; otherwise, use as a cover.