Vulcan desert soft-suit
A Vulcan desert soft-suit was a type of clothing worn by Vulcans to enable them to survive the harsh desert conditions of Vulcan's Forge. 

Spock, as an adult, and his younger self wore desert soft-suits while they were in The Forge. The older Spock's suit had been provided by the 's wardrobe section. ()

Desert soft-suit
Clothing