The Belt Shield was a piece of technology in the animated series The New Adventures of He-Man.
Belt Shields were technology that the Evil Mutants found on the junk filled Carrus Sector Asteroid, apparently left behind there by a higly advanced alien race. When the Mutants proved themselves unable to get most of the machinery to work, Skeletor came up with a plan to kidnap the Scientists of Primus and force them to get all the old technology operational.
When Sagitar, Spinwit and Artilla arrived on the asteroids, they found themselves facing Slush Head and Flogg wearing Energy Gloves with which they could fire powerful energy blasts from their hands while Quakke carried a large gun. Artilla managed to fire his own blasters at the Mutants, but the trio acivated their Belt Shields which activated a force shield that surrounded each of them and made them invulnerable, yet still enabled them to fire their weapons at the Galactic Guardians.
However, the Guardians developed a new tactic to defeat the Mutants, by knocking them down while in the protective buble of their force fields. This allowed the Guardians to set the force fields in motion and send them rolling away.
After escaping in the Starship Eternia, Krex identified the weaponry as being 'Sagillian' devices.