The Therabody Wave Duo Massager offers an ergonomically contoured massage solution to the back, spine, and neck. This portable smart vibrating roller has unique features and characteristics that make it the best option for your spine and back its shape comfortably applies pressure to the peaks and valleys of the back muscles on either side of the spine. The Wave Duo is perfect for your upper body, including your neck, as it comfortably applies pressure to this sensitive area, and, for the low body, it curves around the calves, hamstrings, and glutes to distribute pressure evenly while rolling out these muscles. The Therabody Wave Duo Massager is reshaping the future of rolling and recovery!