Both products ensure that the hand and forearm are supported in a comfortable position and that the shoulder joint is immobilised and relieved. Omo Immobil Sling 50A8 The Omo Immobil Sling is used to immobilise the shoulder joint with internal rotation. Omo Immobil Sling, Abduction 50A9 The Omo Immobil Sling, Abduction, supports the arm with 15° of abduction. The abduction angle of 15° is achieved by using an anatomically shaped waist cushion attached with hook and loop material. Skin-friendly, breathable and pleasantly soft textiles ensure a high level of wearer comfort. The orthosis can be fitted to the patient quickly and easily using the movable thumb loop and the individually adjustable shoulder and waist strap.