We present SleeD, a touch-sensitive Sleeve Display that facilitates interaction with multi-touch display walls. Large vertical displays allow multiple users to interact effectively with complex data but are inherently public. Also, they generally cannot present an interface adapted to the individual user. The combination with an arm-mounted, interactive display allows complex personalized interactions. In contrast to hand-held devices, both hands remain free for interacting with the wall. We discuss different levels of coupling between wearable and wall and propose novel user interface techniques that support user-specific interfaces, data transfer, and arbitrary personal views. In an iterative development process, we built a mock-up using a bendable e-Ink display and a fully functional prototype based on an arm-mounted smartphone. In addition, we developed several applications that showcase the techniques presented. An observational study we conducted demonstrates the high potential of our concepts.