Pros: Plexiglas is see-through and therefore not immediately noticeable. The sheets are available in different thicknesses and can be cut to the perfect size. This means your cat will be able to see everything, and the cat guard itself will not be visually disturbing. Cons: Purchasing and installing Plexiglas can be more expensive than other alternatives. And don’t forget, the panels must be very high, as cats can jump up to two metres from a standing position!