I acquired these infra-oriculaire earpiece. and very frenchement c a pleasure. we have a sound power exeptionnelle (I recalled the way the dangers of ca listen music too loud with this kind of device). there are no pain very comfortable even if you wear long ... not as many headphones that after 10 minutes become simply unsustainable telment it hurt.
I therefore recommend these headphones without hesitation, though Take care to strictly follow the instruction for use and you take care of your ears.