Well, it all starts with the TAC life support. When I installed it, I saw an option says :"EVA life support" or some thing like that.
And then I tried to let Jebediah went out of the Mk1 command pod. I then noticed he had some lifesupport resources on him.
Then the question comes: How?
How can we make a config to make EVAs have extra resorces, such as supplies in USI life support?