The unique computer-modeled design of the EVEREST shoulder rest raises the viola to an ergonomically correct and comfortable playing angle. The one piece body integrated with adjustable leg height means that there are NO angle bracets or swivel mechanisms to break, and NO thumb knobs to misplace. Made of a strong, high grade ABS material which provides both strength and flexibility, this rest maximizes comfort without sacrificing style and elegance. Fits full size violas.