I was a bit apprehensive about these are they’re folding and experience of previous folding storage has not been positive, but I am totally amazed at the quality of these. They are strong! I probably shouldn’t sit on them, but did, I suppose others would as well seeing as they are there and they held the weight of a tall, over average weight, adult without collapsing! That’s pretty good going. I bought two, so double up for yarn craft storage as well as my genealogy papers.