To commemorate the 10 year anniversary of the original Mach One shoulder rest, Peter Mach introduced the new M-07 model that keeps the same famous ergonomic shape while minimizing the amount of material used. The Mach One M-07 shoulder rest is made from a high-tech double-injection mold. The main body of the rest is resilient and strong, while the contact surface is made of a soft, grooved, rubberized compound, similar to what you might find on your toothbrush, for an incredible grip. Plus it is easily washable!