Dynamic-directional pad Dvectis DOUBLE is similar to Dvectis SINGLE; however, with its dual-chamber design, it ensures sitting with better distributed weight load and comfort level. Dvectis DOUBLE is designed to direct muscle tension generated by dynamic sitting into deep back muscles. Similar to Dvectis SINGLE, it promotes back, neck and spine pain relief; strengthens lower back, buttock, and abdominal muscles. Dvectis activated dynamic sitting promotes blood circulation and reduces static overload. It helps with concentration and increases calories consumption. Dvectis DOUBLE is more suitable for use on soft cushioned chairs and surfaces.