The Warmest Survival Blanket

October 21, 2013, by Ken Jorgustin

The Warmest Survival Blanket

Have you ever wondered what is the best survival blanket to have — either in your car as part of a basic survival kit, or in your home, or in a bug-out bag, etc.?

Your answer is here…

Where does the warmth that a blanket provides, come from?

Warmth comes from the heat of your body that gets trapped in the air gap spaces between the threads of the blanket fabric.

A blanket that stays the warmest is directly related to the capacity of the fabric to hold warm air.

It is widely considered that the best natural fabric for this is wool. Here’s why…

If you looked at it under magnification, wool fibers do not lie flat against each-other. Instead they possess a natural ‘crimp’ which keeps the wool fabric relentlessly curly or kinky. This creates countless air gap spaces, even in the most tightly woven wool fabric, which makes it a leader in holding warmth.

Modern synthetic polar fleece comes very close to imitating the natural properties of wool, and is a great alternative to the stuff, particularly if you are allergic to wool.

Polar fleece provides similar warming characteristics as wool in its warmth retention and also possesses the capacity to wick away body moisture while holding heat in its many tiny air pockets.

There are also blankets made of other manufactured fibers such as nylon, acrylic, and other synthetic yarns which imitate the fuzzy loft of woolen fibers, but their chemical bases make them poor wicks for body moisture. Polar fleece seems to be the only close alternative to wool.

So the warmest survival blanket is made of…

1. Wool
2. Polar fleece