I've got a Spada, or possibly Spidi

mesh... I was a bit wary of buying mesh, but it's fully armoured and has extra protection on the main wear spots- it's not all mesh. What clinched it for me was a comparison of where the damage is on my extensively crash-tested FT jacket, with where the extra protection is on the mesh- all in exactly the same places. So that inspires a lot more confidence.
Can't say I wear it very often... My FT jacket is reasonably well vented, and, well, Scotland

But it was a very good deal and might come in useful, and on the occasions it's been hot enough to justify it, it's been absolutely fantastic.