The DonJoy Shoulder Stabilizer Shoulder Pad Attachment (SPA) Brace is intended for use by individuals with glenohumeral ligament (GHL) instabilities during contact sports where shoulder pads are worn. This brace is ideal for the restriction of abduction and external rotation and for symptoms or episodes of anterior and/or GHL instability. It's also effective for posterior instability by restricting the shoulder Range of Motion (ROM) and disallowing the positioning of the joint in angles that increase the odds of a posterior dislocation or subluxation. The ROM control can be customized with easy to use strap adjustments. The arm cuff and straps attach directly to the breast plate of your shoulder pads. It's specifically designed to eliminate the use of a chest vest, making it comfortable and cool to wear even in the hot summer months. Universal fit allows the DonJoy Shoulder Stabilizer Shoulder Pad Attachment (SPA) Brace to be worn on either the left or the right shoulder.