When bagging the Munros of Scotland, warmth is something to watch for. It's worryingly easy for your body temperature to drop without realising it.
That's why a survival bag is an excellent piece of kit to pack, whether you're hiking for a couple of hours or camping overnight. In a pinch, it'll keep you warm until help arrives, or serve as an emergency shelter overnight. In the wilds, it pays to be prepared and survival blankets can help you out in a lot of difficult situations.