How to use an emergency blanket correctly: Which side faces up?

It's within reach in your backpack, weighs almost nothing, and can save your life in an emergency – the emergency blanket. But in the critical moment, a question often arises: Which side actually belongs facing outward? So you can use the emergency blanket correctly – on the mountain, while hiking, or in an outdoor emergency – we'll explain everything you need to know about proper use, how it works, and how to choose the right emergency blanket.

How does an emergency blanket work?

An emergency blanket consists of a paper-thin, metallically coated film with two differently colored sides – usually gold and silver. Both sides reflect heat radiation, but in different directions. This allows the emergency blanket to perform two completely opposite tasks depending on the situation:

• Protection from hypothermia in cold, wind, or wet conditions
• Protection from overheating in strong sunlight

However, the classic emergency foils from first aid kits are only intended for short-term use. Anyone spending longer in the mountains should opt for a robust outdoor emergency blanket that will survive in your backpack undamaged for years. Especially on multi-day tours – for example combined with a lightweight 40-liter backpack for winter tours – quality is more important than saving a few grams. In an emergency, every minute counts.

How to use an emergency blanket correctly: Which side faces outward?

The most important question first: Which side faces outward? The answer depends on whether you want to retain heat or reflect it:

• In cold: The gold side faces outward, the silver side is against your body. This way, your body heat is reflected back by the silver inside and you stay warm.
• In heat: The silver side faces outward, the gold side is against your body. The silver outer side reflects the sun's rays and protects against overheating.

A simple memory aid: "Gold faces out when it's cold." That way, you'll never forget which side goes where under stress. For heat retention, functional clothing is also crucial – those who rely on Merino functional underwear as a base layer have a clear advantage in an emergency because the body retains heat longer.

Practical application: How to use the emergency blanket correctly

In an emergency, every second counts. To ensure the emergency blanket works at full effectiveness, follow these steps:

• Find windbreak: Position yourself or the injured person in a protected spot – for example, behind a rock or under a tree.
• Insulation from below: In cold conditions, always place an insulating layer (backpack, jacket, leaves) between your body and the ground. The emergency blanket alone doesn't protect against ground cold. Optimal is an ultralight sleeping mat, if you have one in your backpack.
• Wrap completely: Wrap yourself or the patient up entirely – including the head, but leave the face exposed.
• Secure edges: To prevent the foil from blowing away in the wind, weigh down the edges with stones or tape.
• Remove wet clothing if possible: Damp clothing drains heat from your body. If the situation allows, remove it first.

By the way: The emergency blanket can also serve as a signal and visibility aid for helicopters. The reflective surface is easily recognizable from the air – a significant advantage in alpine terrain not to be underestimated.

Which emergency blanket is right for you? Material and quality

When buying an emergency blanket, you should consider not only which side is for what, but also quality and material. For ambitious mountaineers and hikers:

• Robust material: Tear-resistant, multi-layer films withstand harsh conditions.
• Size: At least 210 × 160 cm so even large people can be completely wrapped.
• Waterproof & windproof: Protects not only against hypothermia but also against rain.
• Compact packaging: Should fit in a first aid kit or the side pocket of your backpack.

A high-quality emergency blanket weighs only a few grams but can save your life in an emergency. At Alpin Loacker, you'll find durable outdoor emergency blankets specifically developed for use in the mountains – ideal as a supplement to your regular emergency equipment like headlamp, first aid kit, and foldable trekking poles for secure footing on terrain.

FAQ: Using an emergency blanket correctly

How long does an emergency blanket keep you warm?

An emergency blanket can reduce heat loss by up to 90%, but it doesn't replace a sleeping bag. For short-term emergencies, it usually lasts several hours – proper use with insulation from below and wind protection is key. For longer stays outdoors, additional clothing or a bivvy bag is necessary.

Can I reuse an emergency blanket?

Classic thin foils from first aid kits are usually single-use only, as they tear or wrinkle easily. High-quality outdoor emergency blankets made from tear-resistant material, on the other hand, can be used multiple times as long as they remain undamaged. Check your blanket regularly for tears and replace it if necessary.

Do I need an emergency blanket in summer too?

Yes, absolutely. Even in summer, mountain weather can change quickly, and hypothermia threatens, especially with injuries or exhaustion. Plus, the silver side facing outward protects against excessive sun exposure – for example, when waiting for help in exposed terrain. So the emergency blanket belongs in your backpack year-round.