Review on Protect Your Outdoor TV With The Ultimate 40-43 Inch Cover: Weatherproof Material, Wall Mount Compatible, And Smart TV Remote Cover Included! by John Akins

I have not tested this for how waterproof it is in a rainstorm, but frankly nor do I intend to. I got this mainly as "insurance” in case it rains one night unexpectedly. That said, I would have high confidence in this cover. The material is heavy duty, it fits well, even around the rear mount, and velcros together very securely. As long as you take a few seconds to fit it correctly, I can see this being very weatherproof. Good price too - hard to imagine what paying extra would get you.