AcoustaGrip Protege Youth Size Shoulder Rest, Blue Fits 1/8, 1/4 and 1/2 Size Violins and Violas (Pictured here on an 1/8 size violin) Ergonomically designed to be extremely comfortable and it will not fall off. The AcoustaGrip gives a secure "hold" for the violinist or violist and attaches repeatedly. Because it is soft, the AcoustaGrip is much easier on the chin, neck and collarbone than a conventional shoulder rest. Fits easily in the instrument case and prevents the instrument from rattling. Has no clamps that dampen the violin's sound. It allows your violin to vibrate the way it was meant to. Sticks without glue or clamps, leaving your Violin in pristine condition. The AcoustaGrip's gentle attachment will not affect the varnish, edges, or back of the violin.