1st, as standard headphones - they work, to me they are comfortable and the fold flat so packing away works pretty well in a backpack. If your buying these for the stated 90% Ambient noise reducion, move on. If your read the other reviews which state the same - believe them, these units reduce more ambient noise putting them on your ear than when you turn on the system ( and yes-I've got a battery in an they are turned on ). I'm on my way to purchase Bose.