gauze
A piece of fabric used to cover wounds, generally on an injury too large for a bandaid.
Gauze often comes as a square pad and is taped onto the skin, though self adhesive versions do exist.
It can also come in rolls that when applied become bandages.
See also
Gauze on head/face
Gauze on limbs
Gauze on other body parts
gauze on neck
gauze on breasts
gauze on chest
gauze on shoulder
gauze on hip
gauze on back