By 2278, the officer uniform sported black trousers and a double-breasted red jacket worn over a turtlenecked undershirt. The undershirt, along with stripes on the pants, shoulder, and left sleeve had distinctive division colors. The jacket closed by a clasp at the right shoulder and a sealing mechanism that ran along the black stripe. This allowed the wearer to have a more relaxed appearance and likely allowed more circulation of air. An optional skirt was available for female officers. There was a leather vest that could be worn underneath as seen worn by Saavik under her excursion jacket. The vest was seen after she arrived on Vulcan after Genesis. (Star Trek II: The Wrath of Khan; Star Trek III: The Search for Spock; Star Trek IV: The Voyage Home; Star Trek V: The Final Frontier; Star