An arm sling is a supportive device used to immobilize and protect an injured or recovering arm. It typically consists of a fabric or strap that cradles the arm and is secured around the neck or shoulder. This helps to reduce movement, alleviate pain, and promote healing after injuries such as fractures, sprains, or surgeries. Arm slings are commonly used in medical settings, often prescribed by healthcare professionals like doctors or physical therapists. They come in various designs, including adjustable and padded options, to ensure comfort and proper support for the user.