Have the Riva Mesh that I purchased some time ago and totally love them, very comfortable and very breathable for the warmer climate that I'm in.  Wore them so much they're falling apart a bit and needed something nicer to wear to work.  They didn't have the Riva Mesh in the grey color that I wanted, so I thought I'd give these Raith eVent's a try.

I should begin by saying these are also a very nice shoe, but not even close to as breathable as the Riva Mesh.  The eVent fabric, while it does let moisture out seems to not be as good at letting air in, so you're foot tends to get much hotter.  I'd recommend these more hiking in a wetter and cooler climate.

So while they aren't quite what I was looking for to wear in the summer, these might do ok in the winter here or in a cooler climate.