Jesus, that looks like a heavy sleeping bag for a plane... I'd be boiling... particularly if already outfitted in PJs and slippers... Also, that is one hell of a hoagie (2.4L, packed! and 663 grams)!
I recommend a sleep sack (sleeping bag liner). Smaller, lighter, not as hot, but still a personal cocoon (248 grams, actually the size of a half a hoagie).