Many lightweight fabric boots and trail shoes are designed to be worn with a single pair of medium-weight socks. Heavier boots are generally worn with two pairs of socks for added cushioning and comfort. The inner socks should be lightweight Bergelene or polypropylene to wick perspiration away from the feet. The outer pair should be midweight to heavyweight wool for cushioning and moisture absorption. Cotton socks should not be worn inside hiking boots.
Cotton holds moisture next to the skin where it promotes softened skin, hot spots and blisters.
It's important to realize that proper-fitting hiking boots don't feel like street shoes. Until they are broken in, they'll probably feel somewhat tight and uncomfortable across the widest part of your foot and at your ankle. This discomfort disappears with break-in. First, put on the boot and leave it unlaced. Then, push your foot forward until your toes are tight against the front of the boot.