Un:a prefix meaning “not,” freely used as an English formative, giving negative or opposite
Uniform: [yoo-nuh-fawrm], noun, an identifying outfit or style of dress worn by the members of a given profession, organization, or rank.
The ubiquitous 5.11 Tactical Vest has grown in popularity from its covert beginnings with various military and law enforcement units to almost a standard of dress within many private contracting companies and citizens that legally conceal carry. In the Sandbox, it is the un-uniform. While not wearing an official military uniform, it is very popular with the contracting crowd. There are times when this quick recognition is good.