Space Age Cat Carrier Bag

How do you interchange the mesh and bubble viewing covers? I cannot remove the mesh cover.

Hi there,
Here is the way to remove the mesh and install the bubble dome:

How to remove the mesh?
1) Unzip both sides so that you can flatten the backpack down and get a grip on the peephole's outer ring.
2) Put the backpack down with the peephole up and the top of the backpack facing toward you.
3) Grasp, push down and twist the peephole's outer ring to the left with both hands if you have small hands.People with larger hands can grasp, push down, and twist the outer ring while reaching into the backpack and holding the inner ring. Kept twisting and the ring eventually came off.
4) Once you have the ring off, set it aside. The plastic mesh peephole insert pops right out.

How to install the bubble dome?
1) Put the backpack on a flat surface.
2) Put the dome over the peephole. It fits right into the base.
3) Put the ring over the dome and down onto the peephole's base. Press tight.
4) Twist the outer ring to the right and screw it onto the peephole base nice and tight.

Hope this is help. Thank you