Do I need to wear a sling/immobilizer? If so, how long do I wear it and when can I
take it off during the day?
You will be instructed by your surgeon to wear your sling from four to six weeks
depending upon the size of your tear and thus the extent of the rotator cuff repair,
and the sling should be worn at all times.
You may have a small foam cushion between your arm and your body. This should
be left in place at all times while wearing the sling.
While in the sling, the elbow should be bent at a right angle, and the hand should be
level with your elbow or slightly higher. The elbow should be resting slightly in
front of your body.
You may remove the sling for exercises as prescribed by the surgeon/therapist, icing,
dressing, and showering.

Resource: https://www.brighamandwomens.org/asse...