Metallic extrusion of a ground vine (Narvi narviium) grown only on Salusa Secundus and III Delta Kaising. It is noted for extreme tensile strength.

Shigawire was a metallic extrusion of a ground vine (Narvi narviium) that was made into reels to transmit messages.Shigawire, due to its strength, could also be used as a garrote, as in the case of the Sardaukar.

Shigawire was only grown on Salusa Secundus and III Delta Kaising. It was noted for its extreme tensile strength.

Mimic film was another form of shigawire.