The chairs might need to be reupholster soon (see picture).
For one of them, I stapled an elastic band square at the bottom instead of changing the rattan. The work on the cushion is not very well done though and someone handy could probably do a better finish. These staple can also be removed and the chair reupholster with rattan like the first one though. Since the staples have been made at the bottom of the chair, it should not change the look.