Water-resistant and sweat-proof with breathing fiber perfectly disperse heat and absorb sweat. Enables to run or workout in any weather, protecting your phone safe and dry. Nylon fabric Zipper makes no audible noise during running, quietly enjoy workout.Advanced outdoor sports armband case running armband with adjustable elastic hook and loop fastener arm band to fit most of any arm size. Lightweight Running armband with headphones hole makes your wired headphones go through easily to enjoy your favorite song.Work for cycling, jogging, walking, hiking, travelling, exercise, fitness Training, marathons etc.