Briefly, the movie is way better than I expected. Not a masterpiece, nothing special but worth watching. I have no deeper analysis. Period.
Except one 'detail' bothering me. I know it bothers very few of us, so please don't take me too seriously, just because I could not take the movie seriously. I happen to be a Finn, who has survived in frosty forests for the most of his miserable life.
The sub-zero conditions are hilariously unrealistic in the movie. There has to be a reason for this, right? There must be cold somewhere in Canada in winters. Maybe the production was late or something. I don't mean movies should always be realistic, but come on...
It is obviously very cold season, if not exceptionally cold winter. Characters get severe injuries of cold. Kind of damage not being possible without roughly -20°C (or -4°F) and strong wind. But as there is seemingly not that windy, it would be -40°C (or the same in °F) if not even under that. Without proper clothing you go NUMB in that environment. Then it knocks you out for good. Quickly. Before you become a half-frozen zombie.
Eyebrows seem to collect heavy ice layer, but breathing is hardly visible in most of the scenes. The ice layer usually builds up of moisture of your own breathe. Snowing looks like a rain. Because it is so warm it is practically raining.
The structure of snow around looks like it is wet and melting. Winterly rays of sun are too weak to have any effect on ice. The forest looks more like how it could look like in June in Finland... It must be around +5...10°C.
In Finland we call that summer. We go out and celebrate those rare moments of warmth, preferably naked. Well... just being honest, just paid attention to these facts, relevant or not :)