Sandi Rennick's IP4001C, IP4002C, 1P4002.5C, and 1P4003C marimba mallets are constructed with matte-finish birch handles and are wrapped with a multi-ply sage green cord instead of synthetic yarn.  The multi-ply cord offers increased articulation and durability, as well as a more focused sound and weight for a quick response. The increased articulation also creates an enhanced listening environment for the performers, resulting in a more cohesive ensemble.