Polyester

Tegan Jovanka's stewardess uniform was made out of polyester. (PROSE: Cold Fusion)

When Adric was on Monarch's ship and in the spacesuit he found its pouch contained a length of polyester cord. (PROSE: Four to Doomsday)

Captain Robert B. Blandish of the Nepotist wore a polyester top. (PROSE: The Blue Angel)

On Iceworld around 2,000,000 Ace put three sticks of blue nitroglycerin inside an unremarkable stuffed toy dog called Wayne, it consisted of; 60% polyester, 28% nylon, 8% linen, 4% cotton, a small amount of fireproofing residue, and two dead moths. (PROSE: Dragonfire)

In an alternate reality, Panda once died after ingesting a pudding with polyester stuffing. (PROSE: Framed)

Behind the scenes

 * The Seventh Doctor and Ace once visited a planet with blue rinse polyester grass and hennaed skies. (NOTVALID: Doctor Who? 135)
 * In Paul Magrs' novel Exchange (a prerequisite to Enter Wildthyme and Wildthyme Beyond!) Simon owned a green polyester football shirt.