IRC Mk.35 Pressure suit (Earth-5875)

"The Mk.35 sucks in a firefight. You have to learn certain ways of moving your limbs or the hard joints lock the wrong way. If this happens it can take a couple of seconds to shake the joint loose - enough time to get yourself shot."

- - Anonymous UNSC Marine

The IRC Mk.35 Pressure suit, better known as the '''IRC Mk. 35''', is a pressure suit used by the UNSC Marine Corps for extravehicular operations.

Overview
The Mk.35 is a bulky, but well protected, single element that do not require thermal regulation garments. The volume hard joints are combined with the flexible elements of both torso and limbs to allow the full mobility of its wearer, even in the vacuum of space; it includes an oxygen system at low pressures for twenty minutes, as well as a lesser oxygen-nitrogen/helium supply for high pressure environments, such as the orbit of a gas giant. While comfortable and practical, the Mk.35 was rarely used in space engagements during the First Contact War because of the need to decompress the wearer in order to prevent the suit from 'ballooning" in a firefight.