If my above post was unclear on that one, I agree with you; Climashield has two things going for it. It traps air in pockets and is resistant to heat transfer through the actual polyester fibers. That doesn't make it a good heat sink; its thermal inertia isn't actually all of that great. It makes it a good insulator; it's thermal resistance is pretty high.
Sorry if there was some confusion on that due to my wording.