Nathan Light Bender Stay seen in any conditions with the Nathan Light Bender LED Arm Band. Clipping or strapping on, this LED band wraps around your arm and offers multiple settings for blinking or steady streams of light, providing 360º visibility. Plus, it's completely waterproof and sweatproof so you can run in any conditions. The armband is comfortable and super lightweight, reducing chafing and discomfort. Powered by an easily replaceable watch battery, the Nathan Light Bender LED Arm Band can provide 100+ hours of illumination on a single battery.