This really comes down to the issue of warmth. While this was not a specific criterion for this guide, it goes without saying that there will be occasions where you need socks in frigid conditions. The good news is there are some models, and even a few on this list, that will probably not require liners. In fact, some will already be lined with merino wool (which has been discussed in-depth already) and this immediately adds a layer of warmth. But, if you feel that additional liners will be necessary, just ensure you will have enough room for them to remain comfortable.