We bought a regular sun shade from Amazon
a few years ago for our seasonal site. We bought the 10 x 12 size. Our awing faces due west and the sun can be pretty rough in the late afternoon. It works really well until the sun is visible from under the awning. Then, it doesn't help much at all. The main purpose for it is so that I can work under the awning, on my laptop longer. In the middle of the summer, with the shade on the awning, I can stay outside until about 3 pm or so and then the sun is just too bright. Without the shade on the awning, I get chased away a few hours earlier. Perhaps the extra 15% blocking on the EZ ZipBlocker will provide better protection.