Starfleet uniform



Starfleet uniforms were uniforms worn by individuals serving in the Federation Starfleet, originally a United Earth outfit. These uniforms facilitated the wearers' needs as both scientists and researchers, and well as Starfleet's military role. Wearers are expected to abide by Starfleet dress code though special exceptions are sometimes made, such as Worf's Klingon baldric and Nog's Ferengi headdress as well as Ro Laren's earring.

Divisions
Starfleet uniforms were generally broken down by color amongst the three divisions, and occasionally by department, while displaying rank insignia conspicuously. While the colors varied over time, uniforms were designed for comfort even in the most extreme environments. 

Command
The command division was the head of Starfleet with most of the ranking officers in Starfleet Command wearing these colors. The command division, generally, was responsible for the administration of starships, starbases and space stations.

Operations
The operations division was the backbone of Starfleet, being comprised of the engineering, security, and support services. This division was responsible for technological innovation and for maintaining and defending the Federation.

Sciences
The sciences division was the heart of Starfleet, comprised of the exploratory, medical, and mental health departments.

Uniform variations
Some officers wore alternate uniforms. Deanna Troi often wore casual clothing while on duty, and T'Pol retained her original Vulcan clothing, with a few concessions to her Starfleet rank and ship assignment. Other officers, such as Worf, Montgomery Scott and Ro Laren, were allowed to wear accessories relating to their culture with their uniforms, but this was at the discretion of the captain. Uniforms were also altered to accommodate non-humanoid officers, such as the three-armed, three-legged uniform of the Edosian Arex. 

Uniforms were also adapted to environmental or atmospheric conditions. When exploring the planet Tyree, Benjamin Sisko and colleagues wore long flowing gown uniforms to deal with the sand. They featured a colored stripe to represent department. 

Dress uniforms
Dress uniforms were a variant of the standard Starfleet uniforms worn for special occasions, such as weddings, courts martial, funerals, and the greeting of ambassadorial delegations and heads of state.

Design
The Starfleet uniforms worn during Star Trek: The Original Series were designed by William Ware Theiss, who returned to design the Star Trek: The Next Generation uniforms (which were further adapted into future versions on Star Trek: Deep Space Nine, Star Trek: Voyager and the TNG-era films by Robert Blackman). Robert Fletcher designed the uniforms seen throughout the movies, with later new designs provided by Nilo Rodis.

Robert Blackman also designed uniforms worn on Star Trek: Enterprise, a design representing a precursor to those seen in TOS.

As shown in the It's A Wrap! sale and auction, a number of Starfleet uniforms have had muscular padding to increase muscular appearance. Such cases include two costumes for Tom Paris, one racquetball costume for Julian Bashir and a Star Trek: Deep Space Nine costume for Worf (to create a more Klingon appearance). According to Wil Wheaton, all the main cast members wore muscle padding during the first two seasons of Star Trek: The Next Generation, mainly because of the tight-fitting nature of the spandex uniforms used in these two seasons.

Several prototype uniform undershirts to those seen from on were sold off on the It's A Wrap! sale and auction on eBay.

Ambiguous uniform


A Human female seen as a member of the Elysian Council in wore a uniform of ambiguous origin. It was described in the Star Trek Concordance as "a white suit with blue collar and an insignia on the left breast," and was suggested to "possibly an early Star Fleet [sic] uniform". While it is known that the Bonaventure, and possibly other Earth/Federation ships, were lost in the years prior to 2269, it is unclear if this is indeed a Starfleet uniform, and if so, which era it may have originated from.