Nathan sonic boom s4 this nathan sonic boom s4 is a great looking armband that makes it easy to carry your samsung s4 while providing protection yet gives access to the controls features provides protection for your s4 yet gives access to the controls on the large touchscreen fabric wicks sweat away from the skin for better comfort reflective highlights that increase your visibility up to 1200ft in low light conditions ergological design for a soft ergo armband which optimizes com