No finger contortions are needed to operate the buttons. The shape is thoughtfully sculpted for uncompromised comfort and easy-to-reach programmable buttons. Many users, including medical doctors, ergonomists and physical therapists, said the Evoluent VerticalMouse provides superior comfort and even relieved their wrist pain.* The patented shape supports your hand in an upright neutral posture that generally avoids forearm twisting. Avoids forearm twisting for comfort and good health
