The Artino SR-10 Shoulder Rest is fully adjustable for a personal fit on 1/2-4/4 violins and 14"-17" violas. The durable foam padding on the SR-10 is very thick and extremely comfortable. The rest is constructed of aluminum so it is extremely durable. The rubber feet grip your instrument without slipping. Along with being fully adjustable it can completely collapsible to fit in almost any violin or viola case.