Quick Answer
Survival experts recommend space blankets due to their ability to retain body heat and prevent hypothermia, essential in cold and wet conditions. These lightweight blankets can be used to keep a person warm in temperatures as low as -20°C (-4°F). They are also highly compact and convenient.
Retaining Body Heat
A space blanket, also known as an emergency blanket or bivvy sack, is designed to retain up to 90% of the user’s body heat. This is due to its reflective surface, which prevents heat from escaping. In the event of a shelter emergency or exposure to harsh weather, a space blanket can be wrapped around the user or even used to create a makeshift shelter. The recommended way to use a space blanket is to wrap it around the body, with the reflective side facing inward.
Creating Shelter
In addition to retaining body heat, space blankets can also be used to create a makeshift shelter. By draping the blanket over a frame or using it as a tarp, users can create a dry and warm space to take refuge in. When creating a shelter with a space blanket, it is essential to use stakes or weights to secure the blanket in place, ensuring that it remains in position even in strong winds. A recommended technique is to use the blanket as a fly sheet over a natural shelter, such as a cave or a group of trees.
Additional Uses
Beyond retaining body heat and creating shelter, space blankets can also be used in other emergency situations. They can be used to signal for help by creating a visible signal fire or by reflecting sunlight during the day. In some cases, space blankets can also be used as a windbreak or a makeshift clothing item, such as a poncho or a hat. When using a space blanket, it is essential to handle it carefully, as the reflective surface can be easily damaged.
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