Portable is a vague term applied to headphones. Clearly even the chunkiest models are portable if you've got a big enough bag handy, while many would baulk at carrying anything bigger than an in-ear model. The new Audio-Technica ATH-ES10 isn't quite pocket-sized, but it's small enough to fit in a small briefcase or handbag; with the earpieces rotated it's about 25mm-thick.



Link: techradar