Even if you are camping, spending the night outdoors in cold weather can be difficult.
Facing a survival situation in cold weather can be at best inconvenient and at worst deadly, unless you are highly prepared and know what you are doing.
Keeping warm, however, except in extremely cold conditions is easier if you use your surroundings to insulate your tent.
The camper in this situation uses a tarp to separate his tent from the ground and then leaves to insulate the base of his tent, but this method would also work with any insulating substance, including using evergreen bows as a base and insulation and even snow in an emergency situation.
Check out the video on the next page to this amazing way to insulate your tent or shelter using your natural surroundings as the cold and wind repelling insulation you need to stay warm.