A fistula arm protector, often called a fistula sleeve or arm band, is a fabric cover for an arteriovenous (AV) fistula, typically used by dialysis patients. Its main uses are to protect the fistula from accidental snagging or pulling, prevent injury from friction, and provide comfort and a sense of normality. They can also offer protection from the sun's UV rays and minor abrasions while allowing air circulation and free movement.