NEOPRENE VBLs
You need a Vapor Barrier Liner (VBL)
Buy a pair of 3 mm thick neoprene divers sox and 4 or 5 pair of thin polyester or polypropylene liner sox. US Divers brand neoprene sox are best B/C they are factory seam sealed (a must) and are marked Left and Right dedicated sox so they fit better W/O bunching.
Wear them as you would wear relatively thick wool socks but they will keep you much warmer ALL DAY.
At night remove the VBL sox, turn them inside-out to dry. Remove the skanky smelling liner socks and let your feet dry. Next day use new liner socks.
I have used this VBL method for decades and my felt pac liners or ski boot foam liners always stay dry and warm.
I am a former Nordic Ski Patroller and Alpine Ski Patroller (16 years total) and former US Army ROTC Cadet Winter Survival instructor. I do know whereof I speak when it comes to winter clothing.
Eric B.
P.S. In sub-zero winter camping people often also wear VBL suits over a thin base layer. It's a bit clammy in the morning but for a multi-day trip your sleeping bag is warm EVERY night and does not slowly accumulate heat robbing moisture.
Read the story of the British Scott South Pole expedition of the early 1900s. They all died of hypothermia B/C they had no sleeping bag VBLs and the down bags all eventually froze solid.
On the other hand Roald Amundsen's Norwegian expedition beat Scott to the pole and made it back to their base in good shape B/C they used reindeer sleep "robes" which could have the body moisture brushed off after it froze when dried out in the mornings. As well the Norwegians travelled much faster than the Brits because they all were on cross country skis.