>>1164460>>1164464>>1164474Many anons recommend having a quality sleeping bag- For the money, I found this has works well to below 0F.
https://www.midwayusa.com/product/1918261064/military-surplus-modular-sleep-system-mssThis includes wearing heavy thermals, hat, and super cold socks (Described below). Dedicate sleep clothing on the trip to sleeping only. When you go bed, the switch over to clean dry clothes is cold for a few minutes, but worth being dry. Even if you are just sitting around camp your clothing will get damp and you will feel it when you try to sleep.
Pads, maybe two. With the above sleep system. The black bag goes in the green and they both go in the camo bivy. I put the pads in the bivy. Keeps them from sliding around. Blowup and insulated are the best (Big Anges). Thermarest or foam work too. Thicker the better. Get yourself off the ground and have an isulating layer between you and the earth.
There are a number of liners you can put in with you as well. or just a fleece blanket (some are just fancy fleece blankets with zippers). Wool is also an excellent choice. No cotton.
I use handwarmers alot. Use them with some thought. I put 2 or 3 in my sleeping bag and sleep clothes (in the sleeping bag) when I start dinner (5-6PMish). They will warm that stuff up prior to getting into bed. New set at bedtime.
I also have special sock arrangement. I will use regular cotton tube socks and put them on. I have set of oversized wool socks. I put a handwarmer in each and then on the feet. The cotton sock will keep it from getting too hot to the touch. The big wool sock keeps it close to the foot.
Full face masks that cover all but your eyes and mouth.
Drink water. In the cold it is easier to get dehydrated because the humidity is lower. If you are low on water, you will feel colder.
Eat high calorie foods, right before bed. Like a hot cocca with butter in. High fat and sugar snacks. Trail mix. clif bar etc. you burn a crapload more calories