Mine is like what Pat said. I have one solid wall and the rest is hardware cloth. I built half of it under an arbor with a vine on top. This winter I put plastic around the sides and they have done well. I am in North Florida.
Here you can see the right half under the arbor.
this shows the left half from inside (built in two stages because the first is never big enough!
and the last image shows the outside partial wall coming off the solid back wall of the left side
sharon
Here you can see the right half under the arbor.

this shows the left half from inside (built in two stages because the first is never big enough!

and the last image shows the outside partial wall coming off the solid back wall of the left side

sharon