Generally a hot tub cover lifter has a bar that rests against the fold in the cover. After un-clipping the child safety locks from the front of the cover, you simply fold the cover back over that bar. Then, as you fold back one more time, the cover is mechanically brought back, off the hot tub surface and held in place. It’s easy to do by yourself in seconds.
The only negative is that most lifters disrupt the attractive, clean lines of a spa and the look of a smooth flat cover. That’s why Caldera® Spas integrates the lifter bar inside the cover. The integrated bar helps complement the spa’s design, resulting in a much cleaner look and a more attractive design aesthetic.
Read this in-depth article to learn more about hot tub cover lifters.