Iron Neck 3.0Say goodbye to neck pain and hello to comfort and mobility! Feel better faster with the only neck therapy tool that targets and treats the root cause of neck pain, muscle imbalances & mobility deficits. 360 Isometric Training: Enhance blood flow to every muscle in your neck, including those hard to reach, pain causing areas. AirFit Technology: Quickly fits all head shapes and sizes, with interchangeable padding and an inflatable air bladder for a