Everest Violin Shoulder Rest (ES-1, ES-2, ES-4)Everest Shoulder Rests are designed in the USA and manufactured with the finest material and workmanship. These shoulder rests were designed by a John's Hopkins' biomedical engineer to overcome the many shortcomings of existing traditional shoulder rests, which many players still find uncomfortable to use. Everest Shoulder Rests are the only ergonomically designed and patented shoulder rests that provide the best comfort for violin and viola players