The next thing that needs to be decided is whether to get a mesh fly fishing vest or a standard fabric one. A mesh vest is basically a stretch mesh with fabric sewed on where the pockets go. The nice thing about mesh fly fishing vests is that, since they are mesh, on hot days the angler will stay a bit cooler. I've also found that mesh fly fishing vests tend to stretch a bit more with the movements of the angler, but that might just be me. Really, in the end, whether to get a mesh fly fishing vest or just a standard fabric one (get a good fabric one, though) is more a personal preference than anything.