I was wondering about that too: the safety considering how secretive manufacturers were. Intuitively, I'd think the particles are just too large to be a consid

I was wondering about that too: the safety considering how secretive manufacturers were. Intuitively, I'd think the particles are just too large to be a considerable risk. The photo of the man wearing a mask is because they're around it all day every day (+ OSHA I'm sure), but I'm sure people have though the same thing about asbestos or pink fibreglass insulation.