While the lid itself appears to be very secure, I haven't had time to test how well it withstands all the elements. However, I am very disappointed with the security cable. First, there were absolutely no instructions on how to properly use the cable to secure the lid. Second, there were no instructions on how to program a single lock. Since the cord didn't go from the loop on one side of the car to the other and back, I wasn't sure how to secure the cover with a lock. I went to Home Depot to buy two new locks to install on either side to protect the lid from most people trying to steal it without damaging the lid. So many purchases these days don't come with proper instructions but I hope the cases wear well in the Arizona sun and make a good choice.