Wearable robots such as supernumerary robotic limbs (SRLs) can augment human capability, but their effectiveness depends strongly on the operator's sense of embodiment, comprising the sense of agency (SoA) and the sense of ownership (SoO). When an SRL is detached from the body so that the operator can act in two places at once, both the sense of agency and task performance tend to degrade. This paper presents the Multi-modal Embodiment Stimulation Shoulder Pad (MESSPa), a wearable interface that combines one-to-one motion transfer with spatially distributed pneumatic (balloon) haptic feedback on the shoulder, with the goal of preserving the sense of agency across attached and detached states. We describe the system design, the control mapping, and a controlled experiment using a $2\times2$ mixed design that crosses the control interface between groups (MESSPa, $N=13$, vs. keyboard control, $N=12$ from our previous study) and attachment (on-shoulder/detached) within participants, under single- and dual-task loads. Compared with keyboard control in the detached condition, MESSPa significantly reduced task completion time and significantly improved the sense of agency in the detached state, while narrowing the performance gap between the attached and detached conditions. The sense of ownership did not change significantly. These results indicate that combining motion transfer with positional haptic feedback is an effective way to recover agency when a robotic limb is operated remotely.

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