It's pretty much a tall fence, so not sure it would help you. Just some of that bird netting that's used to keep birds out of your gardens and lattice. Privacy Lattice seems to work the best. I'm not 100% sure if nothing can enter since nothing has since I put it all up, but I know it's hard to escape from. I had a racoon enter from my gate and had a hell of a time finding a place to leave from.
Privacy Lattice at the top with bird netting in such a way it's like a "roof" (Sadly catches leaves so you gotta clean it from time to time or replace it) seems to keep my cats in and other stuff out. Every side is over 6ft and there isn't really anything for them to climb onto to help them jump over.
It's pretty similar to your setup, I'd imagine, but my stray cats must be stupid and don't know how to jump. I see cats at the back bugging mine all the time but they never make it inside.