Braces are used to support body parts that are injured or inflamed, including body limbs and body joints. Sleeves are a form of brace that is fitted for the arm.
It is designed as a cast for the arm to allow recovery from fracture, surgery, or infection. Sleeves can also be used to support body movement and fix body growths, similar to braces.
Braces can be removed after the body part has healed enough so it doesn’t need support anymore.