This band is quite what I expected. The maintenance is excellent although I have not tested the clothing (windbreaker jacket kind of running): I used on the skin, and do not worry, it does not move while running. It is easy to forget because very comfortable. The iPhone remains dry in the slot. The sweat is absorbed by the material, which is easily rinsed off with water after use. The adjustment to the size of your arm is very easy and even adapts to small arms rounds through the second adjustment slot. The only minor "hiccups": the insertion of the iPhone 4 in its housing is a little hard because it is really exactly the size of the phone (which is also an advantage for the maintenance and plating against the transparent film) so you need to remove any shell or case before insertion; navigation through the plastic film is not as easy as usual, you have to press a little more on the screen, but hey, it works anyway. Small stupid thing: In iPod settings, you must disable the "shake, mix ', if not with every stride you skip tracks! In summary, very good product that meets my expectations to make the running. What a pleasure to race to race by listening to his favorite music! Associated with an application such as Iphigenie or Geolives, you must have with you the technology for running, with the added bonus a phone in case of need or emergency!