Red Matter Armor is a type of armor found in the "Tekkit" game series that provides 10 percent greater damage reduction as compared to the Dark Matter Armor. The armor also gives 1,000 hearts to the player who has it.
Red Matter Armor can be crafted using red matter and pieces of Dark Matter Armor. Each part of the armor requires various amounts of red matter to create the corresponding Red Matter Armor piece. The best choice of tool to defeat another player wearing Red Matter Armor is a Red Katar; it takes approximately 86 hits using a Red Katar to defeat a player armored in Red Matter.