Shoulder Immobilisation Sling | protect.SISUniversal shoulder immobilisation sling The protect. SIS is a shoulder joint support. The product is exclusively to be used for the orthotic fitting of the shoulder and only on intact skin. Universal fit Simple and rapid adaptation and fitting Indications Shoulder dislocation Immobilisation of the acromioclavicular joint Injury of the rotator cuff Sprain Immobilisation of arm fractures