From Power Rangers Universe

Metallic Armor is a glistening coat on the Power Ranger suits that were used by the Rangers. It was created by Zordon and Alpha 5 to use against the new-and-improved Tenga Warriors that Master Vile had made possible. The armor came directly from the Morphin Grid. It contained enhanced speed and strength as well as resistance to injury and magical spells.

To activate it, call out "Metallic Armor, Power Up!"