You can make something called a SPE it fixes that shifting of your pad and helps the shoulders warm up.
ENO is the only one that sells them they are called hotspots. Most of us in the forum use fluffy down underquilts. Some day I will have to adopt one if I winter camped.
Bacon and Camping makes me happy.
"When life gives you lemons throw them back"
I camp in bear country and I am a bear Burrito.