Wrath of Khan would bring about a whole new look for the Enterprise crew, including a unique jumpsuit for the enlisted members. Star Trek: The Motion Picture introduced a myriad of jumpsuits in numerous earth-tones. To save money, costume designer Robert Fletcher would take some of those jumpsuits and tear them down, re-dye them, re-cut them and reassemble them into an all-new-looking uniform.
The jumpsuit came in two basic versions – black-collared enlisted crew and red-collared cadet versions. The wrist would show a band of color denoting the crewmember's department ala the Monster Maroon color codes. A rank pin was added to the wrist band and a metal Starfleet badge worn on the chest would complete the look. A silver belt buckle was used in contrast to the gold of the officer's uniform.
The WOK Jumpsuit is deceptively sophisticated in its construction. It features intricate stitching and assembling along with real-world basics like pockets to yield a sturdy worker's jumpsuit. To this day, it's one of the most utilitarian – and realistic – of all the Starfleet uniforms.