Insulation When You Need it The Most: This 2 Meter by 1 Meter full length sleeping bag weighs a mere 75 grams. This means, this can be a part of your outdoor kit, whether you are mountaineering or jogging/cycling. While it does not add any weight to your kit, but it can save a life - yours or someone else's, when in emergency like an accident or being caught in sudden bad weather. Often victims of accidents, drowning, etc tend to lose body heat very fast. This insulation survival sleeping bag helps in preserving boy heat by reflecting all the heat inside and keeps the cold outside by reflecting cold radiation outside. You may never need it, and so we wish, but when you do, you will be thankful to the day you decided to put this in your kit. Besides, this is a handy addition to your regular sleeping bag, when that sleeping bag is not enough to keep the cold out. You can insert your sleeping bag inside this bag, and Voila! your sleeping bag will get upgraded by several degrees of protection. It is waterproof, therefore it can also act like a shelter. Suppose you are outdoors, and want to camp for the night. In the absence of a tent, you can push a stick at its mouth and make a triangular entry point, so as to sleep inside this shelter. This trick is especially useful on warm and damp nights, when you may find it hot to use it as a sleeping bag, but need protection from precipitation.