environmental suit

Caption: McCoy in an environmental suit

Star Trek: The Original Series

Episode: TOS 007 - Naked Time

Sealed protective clothing worn by Starfleet personnel in hostile environments.

The style has changed over the years from a softer chromo-metallic fabric in the 2260s to harder-edged materialsin the 2280s and beyond, often incorporating gear built-in such as communicators and magnetic boots.