Mobile headrest is usually an optional item, which you can but do not have to add to your corner sofa. This type of headrest is attached to the backrest using two rails, which you slide into specially prepared tunnels in the cover. You cannot change the angle of inclination of this type of headrest, but you can freely move it between the different backrests. For this reason, you can buy only one headrest and reposition it from one back to another depending on your needs.
The mobile headrest can take various shapes – most often in the form of an elongated flattened cylinder. It can also be shaped like an elongated, narrow rectangular cushion or a round cylinder. It all depends on what style the furniture was designed in and what form its designer wanted to give it.