I can wear my Sennheisers HD600 for hours upon hours. Had to slightly bend the metal stripes to release some pressure when I got them - but I do have fairly large head. After that - pure bliss. They’re light like feathers.

They are open, so it adds a lot of comfort too as my ears don’t get hot. But they leak a lot of sound.

Please be aware that +3 dB raise roughly equals double the power that amp needs to pump into affected frequency.

+20 dB is crazy.