Every earphone had the black olives squeezed on, and as such, isolated like bangers. The back side of the earphone is contoured and easily one of the most naturally fitting pieces of polycarbonate I've stuffed in the old ear holes. What wasn't nice was the cable. It isn't evidently in its final form in Japan (either the cable or the phone, I didn't grab which it was) but I'd not expect new materials. The cables swivelled out away from my ears without me doing anything and are very uncomfortable in combination with glasses.
Sound is very nice. The cable really needs an overhaul.