Epidermal Sensors for Wireless and Enhanced Amputee Skin Tracking (E-SWEAT) Part 1

Inclusion Criteria: * Be 18 years or older * Have a unilateral lower limb amputee (below the knee). The tibial length on the residual limb must be greater than half of the length of the tibial on the unaffected side * Have an amputation that occurred over 2 years ago * Have at least 1 year of experience using your prosthetic leg * Have used the current socket for at least 6 months without a significant skin issue or major modification * Be able to comfortably walk 6 mins (with prosthetic legs) without pausing to rest * Be willing to come to North Carolina State University's Centennial Campus to participate in research and be photographed while doing research activities Exclusion Criteria: * Have a cognitive or visual impairment that affects the participant's ability to provide informed consent or to follow simple instructions during the experiments * Have any neuropathy observed on the residual limb * Experience numbness, tingling, muscle weakness, and/or pain in your residual limb * Weigh more than 300lbs * Do not want to take photos * Are pregnant or plan to get pregnant * Are allergic to latex, which is often contained in medical tapes. * If you are using medication to control sweat on your residual limb, and your medical provider does not think that it is OK to avoid these medications for 48 hours.