The Nathan Marathon Pak is the perfect companion for longer races like the half marathon, marathon, and up. This lightweight belt features a large, zippered pocket suitable for carrying a cell phone as large as the iPhone 7 Plus. Expandable stretch front pockets provide a secure fit and smooth silhouette while you run. The sleek profile allows it to lay comfortably around your waist, fitting in perfectly with your look. Racers will love the built-in gel loops and pocket for stowing used gel pack during your run.