Get one of those ones thats on your neck and you just pull it up over your mouth

My favorite is the chameleon made by Drury Brothers. If it is pretty hot then I go to the H&S Strutt mesh mask with the wire around the eye area that you can shape to fit your glasses.

any old 3/4 mesh one would work thats what my dad likes. but his is a HS one that has the full band around the eyes but nothing ontop of that