Ok... In my trips the temperature rise up soon, 2 hours latter sunrise is 38-42 F and i walk whith a simple T shit.

In really the time between the sunset and sleep and the time i wake and start walk is the problem. Just 3 4 hours.

In my last trip was 32-30 degrees at night making unconfortable without another layer just the first layer and a shell forcing me to sleep soon and suffer in morning.

I use pants in polartec power strech and windblock gloves. In head a half/half Buff with polartec and microfiber.

My sleep system is my luxury item totally overated but give me confort in bivacs.
Is a mountain hardwear phanton 0 and a big agnes Q core sl sleeping pad.