I have standard chicken wire on most of my pens but it really depends on where you are at & what kind of critters are in your area. That beings said you need to make sure you bury your wired (no matter what you use) down into the ground, you will be surprised how quickly the pen can errode or the chickens will dig a hole to dust right next to the fence.
Now knowing what I know now & were doing it again I would use a different wire on the lower portion of the fence.
Now knowing what I know now & were doing it again I would use a different wire on the lower portion of the fence.