The next major redesign occurred in 2373. However, this uniform continued to be used on the USS Voyager and on the USS Equinox until the USS Voyager's return from being trapped in the Delta Quadrant in 2378. (Star Trek: First Contact; DS9: "Rapture"; VOY: "Fair Trade", et al.) Starfleet uniforms were composed of synthetic polymers, and were replicated. (VOY: "Distant Origin")