What is the primary function of thermal blankets?

The primary function of thermal blankets is to retain body heat and prevent hypothermia. These blankets are specifically designed to trap body warmth due to the reflective materials they are made from, effectively minimizing heat loss in cold environments. When an individual is exposed to extreme cold, their body loses heat rapidly, which can lead to hypothermia if not managed properly.

Using a thermal blanket can be a crucial survival strategy in emergencies, as it creates a microclimate around the body, helping to maintain a stable and warm temperature. This is especially important in situations where heat loss can lead to severe health risks.

While comfort while sleeping and shelter from rain are important aspects of survival, these do not address the immediate life-threatening dangers posed by cold exposure. Reflecting sunlight is also not a primary function in this context; instead, thermal blankets focus on retaining warmth for personal safety and survival.