Servo slipper

Servo slippers also known as Servo braces or Repulsorlift assisted braces were joint, foot, leg, hand, and arm braces developed by Mahled Medical Services which used a combination of muscle stimulators, repulsor compensators, and movement servos to provide precise movement under high gravity conditions. However, the braces also served as a medical device in normal gravity worlds, by restoring those with impaired motor skills with ease of movement.

Sources

• Galladinium's Fantastic Technology (First mentioned)