Iron Neck 3.0 Advanced Neck Strength Training and Rehabilitation Device | Reduce Neck PainFeel better faster with the only neck therapy tool that targets and treats the root cause of neck pain, muscle imbalances and mobility deficits. Through Iron Necks unique 360 degree isometric training, you can improve blood flow to every muscle in your neck, especially the small, hard to reach muscles that often cause pain and instability issues. With AirFit Technology, reducing pain and improving posture is done so comfortably, with a custom fit