The Janis Potter series IP404 medium hard yarn marimba mallets fully exemplify the qualities expected from a distinguished, hard-working, energetic marimbist like Potter. The IP404 has wool-blend yarn wrapped around a rubber core. These mallets are designed with dynamic range in mind; they offer warm tones at low levels and project brilliantly when played at full volume. The tough and sturdy birch handles on the IP404 have a matte finish that allows for improved grip.