Who runs like in his spare time and do not know what to do with cell phone, keys & Co. should definitely here to access. I can not imagine to jog without this bag me mitlerweile. It fit in all the necessary things that you need to jog. The bag is tight on the body and shakes and does not slide. One can thus also jump and everything stays in place. Running can be felt not you. I totally loved it and recommend it to anyone really!