The RBO series cases have 30mm thick, solid multi-layer foam padding, providing reliable protection for your instrument, plus additional protection with a layer of ABS plastic. The waterproof polyester material on the outside is resistant to tearing and wear. Specially designed and tested zippers can handle more than 8,000 opening and closing. The extended neck rest has a grip system that ensures stability. This series of cases also offers extra comfort thanks to massage padding on the back. If interested, up to two additional backpacks from the RBO series from Music Area can be attached to the case.