The Medi-Suit is an experimental piece of technology used in The New Adventures of He-Man.
Invented by Gepple, the Medi-Suit was a full body suit that allowed an injured person to heal while still perform his or her daily work without any pain.
When shepherd Caz hurt his leg, Meldoc suggested to use the experimental suit, despite the fact that it's inventor, Gepple, was not there to explain how it worked. Alcon filled the suit with energy crystals, but put in more than necessary. This caused the suit to give its wearer extraordinary speed and strength.
Soon Caz began to use the suit to help local Primans in need, such as saving a runaway baby hover carriage, rescuing a boy from a pit of quicksand and freeing a Giraphant that was stuck between some trees. Caz began calling himself "He-Man Junior" and became a news sensation.
When Master Sebrian learned about the suit, he was dismayed to find the amount of energy crystals that had been added by Alcon and decided to decrease the suits power. But Caz was able to increase the power again manually, and when he found a Distress Signaler with a request for help from the planet Dactis, he borrowed a Astrosub to travel there immediately.
But it was all a trap set by Skeletor and Caz was soon caught in the tractor beam of the Mutant Mothership and taken to Gorn City on the planet Denebria. When He-Man and several Galactic Guardians came to rescue Caz, Caz recharged the Medi-Suit to battle Skeletor together with He-Man. But on his return to Primus, Caz decided to return the suit to the Scientists of Primus, feeling that even with the suit, he was not yet ready to defend Primus.