Dominant Rosin for Violin & Viola, comprised of a delicate blend of fine natural resins and exotic waxes, optimizes the performance of synthetic core strings. It's soft, tacky composition provides the precise friction needed to promote the ideal torsional vibration of a synthetic core string yet does not get "gummed up" on bow hair. It also produces less dust compared to harder rosins, making it the ideal rosin for all synthetic core strings. Made by Thomastik-Infeld.