As mentioned in some description, create movements on the cord slight scratching noises. This one noticed but only in an otherwise very quiet environment. You should wear hearing protection mainly on reading, learning or sleeping, the pegs can be easily pulled off the ends of the string (similar to those ends of laces).
The sound is really good and the plugs can be used easily and also clean. If they are used in a dusty environment, the small container with the clip is really convenient because you do not have stuck in the possibly also dusty pocket the bud.
