Inclusion Criteria:  mid to short transhumeral, shoulder, or interscapularthoracic unilateral amputation, have an existing myoelectric, hybrid, or cosmetic prosthetic limb that they use or have abandoned. The additional resources to train a participant with no prosthetic experience is beyond the scope of this study.  Exclusion Criteria:  open wounds in the upper torso or extremities, body-powered prosthetic users are excluded due to the dynamic requirements of the harness. The investigators decided including women who did not have an existing prosthesis would exceed the time resources for a SPIRE funding mechanism.