Im thinking that when i do some testing when my yeti comes in, i will use my thermarest for the feet. On top i have a big agnes pitch pine thats only 16 oz, good FOR ME down to about 30F. Im a warm sleeper for sure though. I carry an emergency blanket that came in my car emergency kit, one of those space blankets, if it gets too cold i just use that, but i hope to replace my ba soon. hopefully with something that works for me, im leaning towards nunataks or jrbs.