... shoulder;With heating function, can hasten the blood circulation in neck, shoulder and waist, can relieve fatigue, burn extra fatness, keep ... !2) Heating function, heating therapy can hasten the blood circulation in neck & shoulder, can relieve fatigue, burn extra fatness, keep the ... muscular fatgue or pain caused by stiff neck or other illness. 5) Have built-in sandbag, not only increase the weight, ...