It has one main large compartment in the middle, which can hold all your accessories securely with a zip. This area would be very useful for placing your mobile/music player in, as it has a headphone slot built into it. On both sides of the exercise/running belt you have a bottle holder, so you can hold 2 water bottles with you at all times. The running/exercise belt is also water/sweat proof. The elastic belt fits with an adjustable buckle, so it will fit everyone up to an 59" waist. Enquire for details.