Bought this pair of headphones because they marketed it towards people who work out. It was easy to use with a cell phone and the controls for the volume and fast forward/rewind are in a good place to access them. However, when I used it for a running workout and sweated it ceased to work. I wouldn't recommend this for someone that wants it for cardio. I guess they changed it to sweat "resistant," but that is like saying my car is collision resistant until you hit it.