I've had the V4 since sometime in 2020 and just got the V6 as its clear masks aren't going away anytime soon. The V4 has generally been fantastic, I like it better than all the various disposable masks I've used as well as other cloth masks. The V6 is more rigid and keeps off the mouth better than the V4 though supposedly the V6 softens up after washing it a few times. I like the integrated neck strap / ear loops as it lets me quickly take off the mask and have it hanging around my neck so it stays with me.