EVEREST shoulder rests are designed in the USA and manufactured with the finest material and workmanship.  Our shoulder rests were designed by a John's Hopkins' biomedical engineer to overcome the many shortcomings of existing traditional shoulder rests.  Other manufacturers, such as KUN, Mach One, Viva la Musica, Bon Musica, and Wolf, all have very good designs, but many players still find them uncomfortable to use.  EVEREST Violin and Viola Shoulder Rests are the only ergonomically designed and patented collapsible shoulder rests that provide the best comfort for violin and viola players of all levels.