Uridium
Sr Member
I'm not sure you need any cooling.
The armour your making isn't really that "insulating". For nearly 30 years I fought in armour and only once tried my coolsuit under it, just for kicks. Today, people fight and wear complete suits like these, all the time, in all types of weather without any special cooling.
You would have to take into account the fact that metal armor is a less insulating material that cosplay 'Foam' armor. The outside air is going to cool metal significantly more that it would the foam.
Also adding, that its 'cool' you fought in armor!!! [terrible pun intended]