2 Person Reflective Emergency Sleeping Bag, 64 x 84 inches, Emergency Zone, Survival Reflective Blanket
This reflective sleeping bag can save your life.  The key to survival is conserving body heat.  This bag reflects body heat but unlike other sleeping bags, this is double the size and can easily fit two people.  Since it is waterproof, it can also act as a liner for a snow cave.  One double sized sleeping bag is better than two regular ones.