We used this as a sun shield on an uncovered deck. We had excess so my husband was able to make the top totally protect me feom the sun ( I have skin cancer) and make a side to shield the sun. It kept the deck at least 10 degrees cooler as well. This product is very well made. Heavy fabric, it blocks most UV rays ( I believe 90-95) and has heavy grommets not flimsy like the other sun shades. 
We bought a second shield and my husband make a make shift canopy over our pool. It allowed me to enjoy the pool without any 
sunburn.  I didn’t even get a little red! It has given me freedom to enjoy some things that my illness would’ve prevented me feom doing this summer. As a plus, it also protected the water in case oil
Feom evaporation and kept water warm. Win win win for us! 
We highly recommend this!