Safstar Running Jogging Sports Gym Armband Case Cover Holder for iPhone 5 5S 5C (Pink) Perfect fit for: Apple iphone 5 5S 5s Material: Lightweight soft neoprene that is molded to twist and bend but will not stretch out of shape. Water Resistant and sweat-proof function to better protect your mobile phone, make you feel more comfortable during exercise Functionality: Adjustable stretchy Velcro armband protects and stabilizes cellphone without slipping or constricting,enjoy your exercise.Able to access to headphones, buttons, touchscreen feature on the cell phone Safety Features: Built-in hidden key holder to help you minimize carrying extra things when hitting the gym, Built in reflective strip for safe running in low light conditions Sizing: Adjustable Velcro band supports a wide range of arm girth from 8" to 15"