Just to report back, that the mask worked great! The apparently steel
mesh is heavier than what I had though the other masks were that I had
borrowed before, maybe they were finer/thinner. Anyway, the stiff but
basically chainmail fully allows air flow as if not even wearing a mask
(air/breathing wise). The portion that is the clear plastic didn't fog
up at all in 92-95 heat bouting for 2 or 3 minutes in the bright sun.
Again, the ventilation of the mesh probably would have helped avoid
fogging from any material anyway but I do think that the actual material
of the plastic was quite fogging resistent by itself even so.
Just bamboo (probably rattan) waisters & not full force blows and I'm
not even sure if I got hit ever directly on the clear plastic so it was
not yet tested against a hard blow to see if it shatters. Still, better
than fencing with no mask at all & at least I can see out of it (even if
I still couldn't block anything).
As only my 2nd loose-play bout ever, I did a bit better, getting maybe
more equal number of touches in but still mostly based on sheer
aggression rather than any strategic blocking & countering or other
technical skill of mine. Maybe someday I'll be able to fence beyond a
berserker aggressive attack as both defense & attack. ;-) Great fun
though of course!