Curved for your back, neck, and spine. Ergonomically designed to provide comfortable treatment for the back, spine and neck, this portable smart vibrating roller is a uniquely versatile rolling solution. Five powerful vibration frequencies and innovative wave texture work to deliver just the right angles of pressure to areas in need - releasing soreness, reducing tension, and improving movement. From shape to material to added vibration, the Wave Duo is scientifically calibrated to elevate your rolling experience. *Therabody Wave Duo prices are too low for additional discounts or coupons to be applied.