Okay, so my pot belly pig boys ARE spoiled, and have their air conditioned house in the heat of the summer, but there are days when it's cool enough to open their windows to allow the breeze to cool them. Only issue is, if it rains, it blows in and drenches their house! I installed these on their windows, and problem solved!! They're clear, so they allow the sun to come through, but not the rain!! They are lightweight, and I was actually able to install them by myself. If there is a negative, it has to be, and so far I've not had to deal with it, but I'm not so sure they'll hold up during a real strong wind. So, if it happens I will update my review to report how well they held up! If you're needing an easily install canopy for windows, or whatever, these are great!