COMFORTABLE DESIGN: Neoprene material breathes well during strenuous exercises and fits comfortably around your arm. BUILT-IN SCREEN PROTECTOR: Built-in screen protection keeps the fragile glass on the front of your Smartphone from getting damaged. REFLECTIVE ACCENTS: Reflective accents let you run safely at night or in cloudy weather.  ADJUSTABLE STRAP: The adjustable neoprene armband comfortably fits small and large arms and is extremely lightweight. COMPATIBILITY MEASUREMENTS: Works on any device measuring up to approximately 5 Inches x 2.5 Inches x 0.5 Inches.