avoiding friction between your feet and your hiking boots
You need to decide on the thickness of the socks. Will you have a comfortable fit inside your boots with two pairs of socks?
The inner liner sock needs to be a wicking material (like nylon, lifa, polypropylene, or any other commercial wicking material) that will wick away moisture from your feet to the outer sock layer. This inner liner can be thin or medium thickness.
The outer layer can be medium to heavy thickness such as wool or other absorbent material.