Nathan Sonic Boom Armband
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Unique hybrid of polyurethane and performance textiles deliver enduring protection
Soft ergo-armband optimizes comfort and eliminates friction
Moisture-wicking material moves sweat away from body and adds breathability
Reflective hits promote low-light visibility up to 1200 feet
The Sonic Boom Armband is a sleek armband which offers an easy-touch window with an Ergological™ design integrating NDurAthletic™ and moisture-wicking material. It fits iPhone 5, iPhone 4, and 4S and is Ant+ dongle compatible.