Very durable, strong headphones. First time I saw them was in the library, many moons ago, where people/visitors were playing and selecting the CD’s to borrow. Bought 32 Ohm version for portable player, almost a decade ago, and sometimes I still use them at home. Also have the 80 Ohm version, those do sound somewhat different. I might have also had a 250 Ohm version in the past, can not remember anymore.
I mensioned 32 Ohm for portable devices, and while they play well I would not be taking them outside the house (except to the beach house, of course). Even with the leather like pads on them they do take the street noice in very easily. Quite fine for home, studio or even on the train. Not for the street.