This is looking great so far mate, just a few little things I would add/detract to make it better.
First, on the mesh triangles at the collar, add some shadowing (only from the top) over it to show that they are part of the vents, you know what I mean?
Second, I dunno if you noticed but there's the little bit on the top right adidas stripe that you forgot to cut off where the mesh starts. Third, the "sewing" lines you've used aren't to my taste - for starters theyre too thick and second, instead of making them dark like they are, you should make them lighter than the material, or if thats not possible for instance on the white then add a 1 px stroke either side, yea? Dunno if that's possible because I use paint shop pro to make my kits you see. Where the big sections of mesh are i'd add slight shadows coming from the main material onto the mesh to show different depths/materials. Of course that's what I'd do, hehe, you don't have to, but it'd make it look far better imho.
Oh and I'd more sewing lines, for instance one coming from the top of the shoulder where the mesh meets the main body, coming all the way down, next to the mesh, bridging the gap between the two sections of mesh at the bottom and going all the way to the bottom, do that on both sides.
Lastly, I know it looks great on the template here but I think you've brought the mesh into the centre far too much at half way, if you look on the real kits its much more like just coming round from the sides, it doesnt come so far in, I'd say probably only 2/3 of what it does on your design.
Good luck...