Adjustable The adjustable design allows this footrest hammock to easily adjust its height to accommodate different seats and spaces Portable Carefully designed folding mechanism makes this footrest hammock compact when not in use making it easy to carry Easy to use and store Just snap the buckle hang it on the bracket of the tray table then adjust the length you need then put your feet on it Widely UsedThis travel footrest accessory can not only be used on planes trains coaches but also you can use it in office home or hotel