I was lucky enough to find some of those 3M Auras at a local hardware shop. They are like $2 a pop, but everything about them is nice -- materials feel great, I find the inside volume is enough that I can breathe easily, they don't stick out like a beak (IMO having the beak style ones in my field of view is annoying). 10/10 mask, still hope to not need them sooner or later, but given the state of the world would buy again.