Mylar emergency blanket

The Mylar emergency blanket, also known as a thermal blanket, is a lightweight, reflective survival essential used for decades in rescues and expeditions.

About this subject

The Mylar emergency blanket is made from a metalized polyester film (PET) coated with a thin layer of aluminum. Its primary function is to retain body heat by reflecting up to 90% of the thermal radiation emitted by the body. This property makes it indispensable in cases of hypothermia, post-trauma, and in survival kits for mountaineering, trekking, and urban emergencies.

The invention of the material dates back to the 1960s when NASA developed Mylar for use in space balloons and satellite thermal insulation. Soon, the metalized version began to be used by rescue teams and militaries. Today, it is standard in emergency rooms and survival bags worldwide. It weighs only 50 grams and, when folded, takes up less space than a wallet.

Beyond human use, the Mylar blanket has versatile applications: it can serve as an improvised shelter, rainwater collector, reflective signal for aerial search, or insulator for electronic equipment. In cold climates, it is often combined with a tent or sleeping bag to increase heat retention. In deserts or extreme heat, the reflective side can be turned outward to protect against sunstroke.

An interesting fact is that the term "space blanket" became popular after the Apollo missions when NASA shared the technology with the public. In many countries, it is a mandatory item in regulations for adventure races and high-mountain expeditions. Despite its apparent fragility, the material is tear-resistant and waterproof when handled carefully.

Frequently Asked Questions

How to properly use a Mylar emergency blanket?

Wrap the body with the silver side facing inward (to retain heat) or outward (to reflect external heat). In hypothermia, place it directly on the skin or over thin clothing, ensuring coverage of the head and torso.

Can a Mylar blanket be reused?

Yes, as long as it is not torn or punctured. After use, dry it and fold carefully to avoid deep creases that reduce reflectivity.

What is the difference between a thermal blanket and a Mylar blanket?

They are the same product: 'thermal blanket' is a common name, while 'Mylar blanket' refers to the branded metalized polyester material.