For clarity of sound and stable fit, these earphones were carefully designed based on principles of ergonomics. The delicate design of the earphone tip minimizes the pain and the possibility of infection that sometimes results from long-time use of in-ear phones. The design even considered the flow of the cable along the face line, avoiding contact with the earlobe and preventing any possible discomfort. The design of the buds is based on the shape of the cochlea.