To provide an extravehicular activity system in which a primary life-sustaining system is retained in a cover.

An extravehicular activity system includes a vehicle 10 having a bulkhead providing a port. The bulkhead separates an interior environment 11 and an exterior environment 13. The exterior environment is configured to be exposed to atmospheric pressure in a donning condition. A cover has a perimeter with a side of the perimeter secured to the bulkhead by a hinged joint. A spacesuit is supported on the bulkhead in the exterior environment and includes a flange providing a rear entry opening 26 aligned with the port. A primary life-sustaining device 18 is retained in a cover and spaced from the flange in the donning condition. The primary life-sustaining system is configured to be rotated about the hinged joint and into engagement with the flange in a donned condition in which the primary life-sustaining system is removably secured to the flange.