Why are space blankets popular among ultralight backpackers?

Why Space Blankets Are Essential for Ultralight Backpackers

Space blankets, also known as emergency blankets or bivvy sacks, are designed to retain body heat in extreme cold environments. These thin, lightweight blankets are made of aluminized Mylar or polyester and can reflect up to 80% of the user’s body heat back to them. This is crucial for ultralight backpackers who prioritize weight and space efficiency in their gear.

Choosing the Right Space Blanket

When selecting a space blanket for ultralight backpacking, consider the following factors: weight, size, and durability. Look for a blanket that weighs less than 1 ounce (28 grams) and has a compact size that can be easily stowed away in a backpack. Consider a blanket with a waterproof coating or a built-in stuff sack to protect it from the elements. Some popular options include the Space Brand Emergency Blanket (6.3 oz, 6.2 x 8.2 in) or the SOL Emergency Bivvy Sack (1.2 oz, 6.2 x 8.2 in).

Using Space Blankets Effectively

To maximize the effectiveness of a space blanket, use it correctly in emergency situations. First, locate a dry spot to set up camp and clear any leaves or debris from the surface. Then, place the space blanket on the ground and sit or lie down on it, allowing the insulating layer to trap heat between your body and the blanket. If you have a bivvy sack, use it as a sleeping bag or emergency shelter in extreme weather conditions. When not in use, store the space blanket in a dry, protected area to maintain its effectiveness.