A Cooling Suit is among the most lightweight, comfortable pieces of cooling gear worn by MechWarriors. The suit is constructed from a breathable body-stocking interwoven with thousands of tiny, flexible cooling lines. A compact coolant pump worn on the belt draws power from the BattleMech in order to circulate the coolant and protect the wearer from the dangerous build-up of heat in their cockpit.
Such suits were once standard issue in the days of the Star League, but with its collapse and the onset of the Succession Wars, they became lostech. Meanwhile, the Clans never lost the technology needed to manufacture them, making cooling suits common among their warriors, and with the rediscovery of this technology they are slowly becoming more widespread within the Inner Sphere.
- LosTech: The MechWarrior Equipment Guide, pp. 50-51, "Hostile Environmental Gear - Cooling Suit"