The use of Wearable Cardioverter Defibrillator (WCD) has been controversial in patients diagnosed with non-ischemic cardiomyopathy prior to permanent internal defibrillator implantation. We present a case of a 20-year old patient presented with severe non-ischemic cardiomyopathy. He was started on conventional medical treatment and was discharged home with a LifeVest® (ZOLL, Pittsburgh, PA, USA). The next am he sustained a ventricular fibrillation arrest and was defibrillated successfully with the LifeVest®. This case illustrates the importance of protecting patients with a LifeVest® when they have a severe reduction in ejection fraction using a WCD irrespective of age or the lack of coronary artery disease.