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Stygian-triprismatic polymer was a harder form of duraplast. The mineral was used in many armors and shields, such as that worn by Shadow stormtroopers, and in some types of Mandalorian armor. It could also enhance portable stealth fields and sound dampeners as well as being lightsaber resistant.
Sources[]
"The Emperor's Pawns" — Star Wars Gamer 5- Rebellion Era Campaign Guide
- The Essential Guide to Warfare (as "stygium-triprismatic polymer")
- The Star Wars Spy Game: SPIN Declassified on StarWars.com (article) (content now obsolete; backup link)
- The Imperial Warlords: Despoilers of an Empire, Part 3 on StarWars.com (article) (content now obsolete; backup link)
- Star Wars: Imperial Handbook: A Commander's Guide
