Everest Viola Shoulder Rest for 15"-16.5" Violas Features: Specially Engineered Fixed Tilt – The unique computer-modeled design of the EVEREST shoulder rest raises the violin to an ergonomically correct and comfortable playing angle. Teachers, students, and professionals alike have all praised this innovative and distinctive design: teachers love the way it trains correct playing angles, while students and professionals love the comfort, durability, and style.