A multi-layered orthosis designed to stabilize the human shoulder joint. A base harness includes a shoulder enclosure, an anterior panel, and a posterior panel. An adjustable break separates free ends of the anterior and posterior panels which are distal to the shoulder enclosure. The base harness is applied to a patient by slipping the shoulder enclosure around the affected shoulder. Anterior and posterior straps are passed over the deltoid region of the affected shoulder and secured to the base harness. An additional large strap is placed over the anterior and posterior straps.