Is any of your mesh gear made of metal mesh at all? Stainless steel like this - http://www.bwire.com
Leather is absolutely the way to go in the winter - I find that when I wear it in the summer, the heat is unbearable.
Mesh absolutely breathes better, but I was curious about the metal mesh - I made a prototype of the stuff, and I was expecting it to be heavy, but it really was quite pleasant to wear. I will have to do some more testing, but the main problem I have run into is the flexibility. I am starting to think that my best bet for a more flexible mesh would be a mesh that has a smaller opening.
I think the metal wire mesh may be a nice hybrid between the textile and the nylon mesh....
Has anyone else tried metal mesh gear?