Are folding fabric storage ottomans sturdy enough to sit on?

Many folding fabric chests advertise high static load ratings (often 500-660 lbs), and high-volume verified-purchase listings generally report they hold up as occasional seating. That said, folding designs prioritize flat-pack value over the rigidity of a wood-framed bench, so reviewers note the lid and seat are softer and less furniture-like than upholstered, leg-mounted models.