My trail runners mesh wears out before my souls

I would think that it is soles, not souls.

I don't think that the mesh wear is a defect. I think it is more an issue of fit and how your foot flexes within the shoe. In other words, if you wore thicker socks that caused a tighter fit, there would be less flexing and therefore less mesh wear out.

If you can get a hold on this before the mesh is too far gone, you might try smearing some Barge Cement on the worn spots. That is a very sticky glue, and it works good where I've used it.

–B.G.–

I have painted some diluted silicone on some of mine.
Mind you I have done that with the bottom of backpacks, stuff sacks, stove base, carpet ends…

It is a rare trail runner indeed which dies because of sole wear rather than holes in the upper. I can think of very few I've owned in the past five years.

The best preventative measure is to paint thin layers of aquaseal over wear points. The crappier the mesh, the broader the area painted and the more layers. My Lone Peak 1.5s have needed a lot of goop to stay alive, and the soles are nowhere close to wearing out.

Not sure how many miles you have on your shoes, but I would be worried if the inner sole is still providing support and cushioning. My experience is that the inner sole is the first to go.