Refrigeration suit
A refrigeration suit was a type of clothing used by the Breen, making up their equivalent of a military uniform. It was believed to be a type of environmental suit to keep a Breen's temperature at a lower level than its surroundings. The Breen theoretically wore them to maintain the cold temperatures on . 

However, in 2375, Weyoun claimed that the Breen homeworld was actually quite mild, thus raising questions over their use of the suits. ()

Background information 
There were two distinct styles of refrigeration suits seen on . 

The first was a standard uniform worn by regular Breen and Breen soldiers. As noted in the script of , the Breen wore "armored pressure suits which protect them from Dozaria's harsh atmosphere."

The second was a more ornate version worn by Thots and other command officials. As noted in the script of , "We've never seen one of the Breen before – he has distinctive markings on his suit that we'll eventually learn identify him as a high-ranking general." This style had golden lining on the shoulders and arms, as well as distinctive gold stripes that ran down the center of the top of the helmet and down the top of the "snout" section of the helmet.

Clothing
Life support technology

de:Kälteanzug
nl:Koelpak