REI Merino Wool sock liner
If your like me and struggle to keep your feet warm, these Merino Wool Liners can a god sent. Even though these liners are light weight they can make a big difference in not having cold feet. One of the most important things you can do to keep your feet warm is to keep them dry. It is not uncommon to find your outer sock to be damp, but these liners bone dry, this is a big deal. These liners have a very good wicking ability. You may want to have two pairs. When one pair is not being worn, they are actively being dried.