ES 610 BB
They are bamboo. Definitely real wood, I have opened them up. The finish is so clean it looks like plastic from the outside. The metal parts look very thin, but seem quite strong. They fold in a strange way, not very small, slightly awkward. The plastic joints work well, and are a bit stronger than they at first appear, but I don't know how long they will last. They do not sound anything special at all. I have put a little sound deadening material inside, which made them sound slightly clearer, but reduced the (already minimal) bass somewhat.The baffle does not appear to make an airtight seal, either, on the cup. But that seems to be by design, rather than bad workmanship. I think that the cushions actually have real leather on the front. I would say that of all the models I have from eSmooth these are the least well made, but the workmanship is still of high quality, they are quite exotic. They are also amazingly light, they make Koss Porta Pro's feel like they are made of lead.
I hope my comments help...
I have made some suggestions to the manufacturer, and they say they will discuss with their technicians. I am not sure if they will take me seriously, though, and anyway, what do I know! : )
Oh - they cost USD 25.00 plus shipping.