Mylar emergency blanket

Mylar emergency blanket, also known as space blanket, reflects up to 90% of body heat in hypothermia and first aid situations.

About this subject

Mylar emergency blankets, commonly called space blankets, are made of a polyester film coated with aluminum, originally developed for thermal insulation of satellites. Typical dimensions are 52 by 84 inches (132 by 210 cm) and they weigh less than 2 ounces (50 grams), folding into a compact package that fits in a pocket or survival kit. The metallic surface reflects up to 90% of the body's radiant heat, minimizing heat loss through radiation, which is vital for preventing hypothermia. They are widely used by emergency services, marathon runners, and mountaineers. Although designed for single use, they can be reused if not torn. Their versatility includes use as an improvised shelter against wind and rain, or as a reflective signal for rescue. The technology originated from NASA's space program, but today it is a standard item in first aid kits worldwide.

Frequently Asked Questions

Does the Mylar blanket actually warm you?

Yes, but it does not generate heat. It reflects the body's radiant heat back to the person, reducing heat loss. In cold environments, this helps maintain body temperature.

Can it be reused more than once?

Although thin and prone to tearing, the blanket can be reused if handled carefully and without punctures. Many manufacturers classify it as single-use.

What is the difference from a regular blanket?

A Mylar blanket is extremely lightweight, waterproof, and does not retain moisture. It reflects heat instead of insulating, making it more efficient in emergencies where weight and volume are critical.