These helmets do not stifle my ears like other headsets 100 balls that you can not keep summer hours or more in a row! Other helmets give me the feeling of having a constraint to the outer world, we find it irritating when used a KOSS :) We quickly forget something on the head. This is ideal in all situations; transit, laptop, living ... The sound is a perfect reproduction of what the artist wanted us to hear at low or high volume. Pay attention !!! There Chinese imitations on Amazon for the same price as the original, it is a scam because they sell it with the same name, impossible to know until the packaging is opened. These imitations are not worth one, the poor who listen to it without having experienced the original will be disappointed by KOSS. We recognize them as: - The cable is very short, even if the packing there is written the same length as the original - The jack is right, step L as original porta pro - The hoop is deformed when bent too - The brand PortaPro is not written quite the same - The adapter jack is not gold - The plastic is of poor quality - The sound is awful :)