In fact, I thought that the great weakness rather the substance that yes most tears before the frame has weaknesses or plastic joints were. But the substance and the joints are more stable than the thin "tube" from which the frame is constructed. Especially on holes tearing the metal without much effort.
So if you want to spend any money above should be aware that these chairs (or the chair, there also within a single package) is not really worth it, you should not like I go to festivals and its good, expensive Deckchair not want to jeopardize ,