Other posts have complained about hissing - I have only experienced this when the sending unit, in my case the computer, is idle and not playing anything

A major positive is that the earcups are not nearly as snug and clamped-down as most of the more expensive units we tested

Even better, I can turn my unit volume way down for my supersensitive hearing, while my husband can bombard his eardrums to his heart's content

, I returned the bad unit with the return label Amazon sent to me

U will be very satisfied with these headphones!

and whatever size you have take them off before you go somewhere where u dont want them to fall off.