Liners can also be used as a protective layer to keep wool from touching the skin of sensitive individuals. They can also reduce friction between the foot and the boot. If your boots are a little big, liners can fill in some of the extra space so your foot doesn't slide around. Silk is also used in liners for the same purpose as polypropylene. It feels wonderful but must be pampered somewhat when laundering.
Construction is nearly as important as the material used in socks.
Bulky seams can create areas of sensitivity where blisters are likely to form. Snug, not tight, fit. I prefer socks with good elasticity that hugs my foot comfortably, preventing the material from bunching up. Thick socks that provide cushion for the ball and heel of your foot. I teach because I truly enjoy helping people to enjoy the outdoors as much as I do, so please feel free to contact me .