The revolutionary heatable self-healing tool. Incredible for spinal and muscle release almost anywhere in your body. Soothes and releases tight areas within 3 minutes from body weight alone—no effort required. Just find the spot and let your body “melt” into acuBall’s patented technologically advanced design. Try it once—use it forever! Use the small nibs on the bottom of the acuBall to release tension lines in your face and massage your scalp. Water-filled, not made with natural rubber latex, and hypoallergenic.