About D'Addario VR200 Natural Light Rosin for Violin, Viola, and Cello:
 
All-natural ingredients are combined to create D'Addario Natural Rosin, perfect for either horsehair or synthetic hair bows. Its unique plastic channel provides an easy grip for students and is packaged to fit nicely into instrument cases. D'Addario Natural Rosin offers premium performance at a great value.