In case anyone is curious (like I was) what the "gold foil wrap" actually is, here you go:

Multi-layer Insulation, or simply MLI, is a type of high-performance insulator that uses multiple radiation-heat transfer barriers to restrict the flow of (heat) energy. In simple terms, it’s a form of thermal insulation made of multiple layers of thin sheets that is used to cover spacecraft and other space equipment in order to reduce heat loss by way of thermal radiation.

Full article

This is really interesting and I would probably never read it if not for this post. Thanks!