In addition to height and width adjustment, VIVA shoulder rests for Violin feature a unique, patented lateral adjustment system, to ensure a perfect, custom fit for any players' shoulder width. Sleek, European-made contoured frames and end members are molded out of virtually unbreakable, high tech BASF plastic, with ribbed soft rubber feet to grip the edges safely for a secure, non-slip grip. VIVA shoulder rests are also ergonomically designed so they cannot tip or collapse, and are thickly padded for comfort.