The Vandoren M/O ligature combines the lightweight construction of the legendary Masters ligature with the highly efficient tightening of the Optimum ligature. It is lightweight and easy to set up.

It has a quick and symmetrical tightening with a unique double-track s crew mechanism that goes opposite the reed. This leaves only two small contact points on the reed. Thus, the M/O ligature allows an optimum vibration of the reed and a crisp articulation.