DC Fontana’s first-draft script for “Journey To Babel” establishes that Sarek and Amanda had been married for thirty-eighty years and that prior to his ambassadorial career, Spock’s father had been an astrophysicist.
…”I tried to invent a design system for each one of the alien cultures,” [Robert] Fletcher explains. “I tried to make the Vulcans as far from Klingons as I could in the choice of fabrics and silhouette. They are very non-militaristic and have clothing closer to priestly robes.
“…One of the worst things about hiring two hundred movie extras is their hair. Trying to make them look unearthly, you must cover their heads. If you just wrap a cloth around them, they’re going to look [Middle Eastern]. If you go into very elaborate hats that have trim and a lot of doodads on them, you go into vast expense.” Fletcher compromised, using simple headpieces, a lot of monk-type hoods, and some long straight wigs that conveniently covered ears.
Star Trek Costumes: Five Decades of Fashion from the Final Frontier, Paula M. Block and Terry J. Erdmann