I wanted an iPhone armband to be able to play sports while listening to my music and being able to control it without difficulty ... I must say I'm not disappointed for purchasing the cuff: it fits all sizes (I pass on my wrist to be able to watch videos for cardio and I put it back in my arms for the muscu) is absolutely not annoying, and matter is not at all unpleasant to wear. It adapts perfectly to the shape of the iPhone 4, and navigation, although it will be slightly stronger support than usual, is very fluid. In short, an article which I am very satisfied and I recommend to athletes who, like me, they want to take their applications, music, videos and contacts with ease.