Before you head out, make sure you know what you're doing. I won't deny that some books have helped me tremendously, but most of this stuff is my personal opinion, and it will serve you only if you have enough experience to be able to assess it from an educated viewpoint, and ignore whatever doesn't work for you. I promise I won't blame you if I freeze any extremities, either. Know your limitations. Therefore, our lives depend on our clothes .
Humans are plantigrade bipeds.
We tend to flounder in the snow. Therefore, we are well served by aids to transportation . Therefore, we need some kind of shelter . Humans are not browsers or scavengers. Therefore, to keep moving, we need to bring along some food .