
Spock wearing typical 2230s Vulcan street wear
Streetwear was a term used to denote typical clothes worn in the course of daily life, as opposed to formal or night wear.
In 2269, before traveling back in time to rescue his younger self, Spock requested some changes of clothing dating back to the Vulcan year 8877, including streetwear, in order to blend in. (TAS: "Yesteryear")