JC, the number 6 item (masks) is basically a spit guard (cough/sneeze guard) so that we don't spread it out. It's something to stop it from inside out, and not just outside in. It's like the "Don't litter on the freeway or streets" idea.... it's not just others don't litter but us too lol.... because none of us wants to touch or step on someone else's virus lol. The surgical/flat mask is more comfortable for all day use and so we see people everywhere worldwide using it. The N95 white round type is of course better filtration wise but more difficult to breathe. The green N95 is extremely difficult. The green/round N95 should be for the medical folks that have been trained to breathe or gonna pass out while walking down the streets lol. The other day I was looking to get 6000 + 5000 of the blue or green surgical/flat masks to donate to local health groups but gave up (no luck for this amount).