The HiTie was developed to provide a comfortable and safe alternative to trailer tying and portable corrals. The HiTie gives horses free movement and access to an area equivalent of a 13 foot diameter round pen. This safe, controlled movement gives horses the ability to graze, eat, drink, roll and lie down while tied.
Also:  here is a great video to show how the bungee is used:  https://youtu.be/Uk0pSyFHBZc?si=OCHgJysIylYddGI2