Silk
From Memory Alpha, the free Star Trek reference.
Silk is a fine fiber that is produced by certain insects.
Elim Garak recommended silk lingeries from Kraus IV to Lursa and B'Etor in 2369. (DS9: "Past Prologue")
In 2370, Keiko made Miles O'Brien a handkerchief made out of silk. (DS9: "Rivals")
