The Innovative Percussion Ludwig Albert IP3105B Medium Yarn Marimba Mallets feature specially cut birch shafts for less movement of the mallet head. They've got weighted, medium soft rubber cores and strong wool-blend wrappings that create full, warm sounds in the middle range of the marimba.
The IP3105Bs are designed for playing in the middle range of the marimba, but still produce a great sound across the whole instrument.