Shoulder rests provide ergonomic support for violinists and violists, helping with posture, comfort, and control. Innovations in shoulder rest design have improved playability for musicians over centuries. Prominent brands include Kun (Original and Bravo), Everest (EZ Series), Wolf (Forte Primo), and Bonmusica (Adjustable Rest). These accessories are crucial for students and professionals alike, preventing tension while enabling precise technique and extended playing sessions.