People bought this because they got really tired of jumping, wiggling, contorting their arms behind themselves to get a dress on. They wear a lot of dresses for work and others leave work before they do. They love this and it works perfectly with all zipper types.
You got one of those bathing suits that is a one piece with short sleeves. It goes all the way up to her neck like a rash guard and has a zipper. This thing has been so handy for you to get in and out of your swimsuit without having to find someone to zip and unzip yours. Especially great when you goes to gym pool or summer camp.