Behold: the Sennheiser PXC 250-IIs.
These headphones are very light, very portable on-ear headphones that can fold up to be even more portable, as shown here:
The headphones have an in-line volume control that also doubles as an on/off switch for its active noise cancellation feature.
And here is what the headphones look like on a photorealistic human head, the part of which is played by our head and torso simulator, HATS.
|Sensitivity (at 1 kHz)||112 dB|
|Impedance (at 1 kHz)||300.0 Ohm|