These are some basic scenarios of course, but the important thing is that by combining all that I have, I am able to withstand a wide range of conditions, including those far worse than I am preparing for, both on the move and while sleeping. I can easily accommodate different variations of scenarios above - e.g. fast walking (5-6 km/h) over easy terrain, relatively slow but physically demanding ascents, sudden wind gusts, etc. If I have to, I can even sleep as cold as -15C with this setup for a night or two.
One thing to keep in mind is that the
body is a source of heat to be used to your advantage. You need to avoid getting hot when you don't need to. Layering and ventilation are both key to this. Layering allows not getting too hot in the first place. Good ventilation deals with excess heat. Both my thick fleece top and the rain jacket have good ventilation. The rain jacket has zippered side seams which allows having a wide range of ventilation options (e.g. I can even use it as a wind breaker) and making changes while moving. On the other hand, you need to generate and retain sufficient heat to achieve a warm sleep. This is achieved by eating food before sleep and then conserving heat through adequate insulation. It may even make sense to eat a part of the evening meal in the middle of a cold night to keep the heat generation going.
Another important consideration is
how you breathe during a cold sleep, especially in a sub-zero environment. The goal here is not to be breathing the cold air directly. I sleep in a balaclava that covers both the nose and the mouth, which creates a warm air buffer. If I need to, I can use my thin fleece layer to build additional face protection for the night.
Now, let's get to the interesting part - the shoes! This is probably the most difficult piece of gear to pick, especially for a 4 season hike. To state the obvious, you want something light and comfortable (to do 25+ miles a day), waterproof (to stay dry and warm), breathable (not to get too warm) and high enough (not to get snow or water over the top). It also needs to dry quickly in case you do get wet. My final pick is the
Adidas Terrex Free Hiker Cold.Rdy and I am happy with the test runs I've done so far. I also packed a pair of lightweight Decathlon microspikes for when I need them.
To close the topic for now, I will add that I have had a couple of hikes ruined by bad shoes in the past. If I had to pick the main reason for that it would be
the size. To be more specific
size too small. In my experience that was the root cause of the majority of the feet problems that I faced. The funny thing is that it took me many years of hiking to figure this out. I am going to end this by saying that until I turned 35, I was convinced my EU size was 42. I have been wearing size 43-44 for the last 5 years and most of my feet issues disappeared.