Vitarian wool

Vitarian wool was a type of wool used in clothing designed for cold climates.

In 2372, Elim Garak sold Morn a pair of undergarments made of this material. (DS9: "The Way of the Warrior")

According to Star Trek: Star Charts (p. 46) and Stellar Cartography: The Starfleet Reference Library ("Federation Historical Highlights, 2161-2385"), there was a star system named Vitar (Vetar), which might possibly be the system of origin for this material, in the Alpha Quadrant. The system's primary was a G-class star.