The velour uniforms are winter weight, whereas the doubleknit ones are summer weight. This episode takes place in the winter. Or, possibly, the environmental controls are out of whack, making the ship a bit colder than usual, forcing the crew to wear warmer uniforms.
OR, Starfleet changed their minds and switched back to the velour.
I can keep this up as long as necessary...
OR, Starfleet changed their minds and switched back to the velour.
I can keep this up as long as necessary...