The TT-17A Hydra was a type of Mandalorian armor that was vastly popular with both Mandalorians and bounty hunters alike during both the Cold War and the Galactic War. With notable users of the set being Tarro Blood and the famed Mandalorian bounty hunter Shae Vizla, the TT-17A Hydra unlike of the traditional T visor common in other sets of Mandalorian armor, the Hydra uses a X visor instead.