User blog comment:AnnhilationNation/Joint Ops: Round 3: Cad Bane (The Clone Wars) vs. Jango Fett (Star Wars: Episode 2)/@comment-422690-20101214032022/@comment-422690-20101220050717

Lightsaber-resistant material... that would me, most likely, Phrik, Cortosis, or Beskar. Those are really the only ones that show up consistantly in the Clone Wars period. Most likely Phrik, since it gets the most mention.