1. material - Water-resistant and sweat-proof with breathing fiber disperse heat and absorb sweat. Enables to run or workout in weather, protecting your phone safe and dry. 2.Sports Armband-Adjustable strap stretchable up to fit for most arm circumference, holds your arm and firmly so you can worry-free. A hole on the top allows your earphone cord to pass through. 3. Cell phone armband-Large compatibilities - Fits for cell phone machine ,Such as: Pocket Pouch Key Holder: Enough space, except take your phone, still can store your Keys and Cash inside the armband behind your phone. 4.Dustproof, scratch resistant, lightweight and flexible, for most sports activities like jogging, running, cross training, canoeing, hiking, horseback riding, mountain biking, gym, horse riding etc.