A uniform from Starfleet, from the Star Trek universe. There are actually variations per series/film in the franchise.
The Original Series (includes the Mirror Universe)
See post #4633403, left side.
In the TOS, set in the 2250s to the early 2270s, the standard duty uniform consists of a long-sleeved Tunic with rank insignia sleeve stripes, color-coded by division (gold = command, red = operations, blue = sciences/medics), black Undershirts, black pants, and black Boots. Captains wore a green-yellow wraparound tunic similar to East Asian clothing. Female uniforms were of a single tunic/Miniskirt combo with Pantyhose.
See post #5449483 for Mirror Universe.
In the episode Mirror, Mirror, the Terran Empire uniform is similar, replacing the Starfleet delta insignia with the sword-and-globe imperial insignia and adding a gold Sash belt. Female uniforms consisted of a cropped Tank Top, black Midriff undershirt, Miniskirt, and thighhigh boots.
The Next Generation
See post #1121461.
The TNG, set in the 2350s, has a different version of the uniform: a black Jumpsuit with the assigned color of division in front (red = command, gold = operations, blue = sciences), Starfleet insignia on the left breast side, rank insignia on the right Collar.
J.J. Abrams' Kelvin Timeline films
See post #4633403, right side.
Similar to the TOS but updated to have solid rank sleeve stripes and darker color shades.