Quick Answer
In most survival situations, a non-reflective space blanket is the better choice, as it prevents accidental startle responses from others and doesn't increase the risk of being spotted by predators. However, a reflective space blanket may be beneficial in signaling for rescue in daylight or high-visibility areas. Choose based on your specific needs.
Choosing the Right Space Blanket
When selecting a space blanket, consider the primary purpose: warmth or signaling. Non-reflective space blankets are best suited for emergency warmth, as they trap body heat and are easier to use in a shelter. These blankets are usually made of thin, lightweight materials that retain warmth well. For example, a 0.5-ounce Mylar blanket can retain up to 90% of body heat. In contrast, reflective space blankets are designed for signaling and are often made with a metallic coating to increase visibility.
Signaling Considerations
If your primary concern is signaling for rescue, a reflective space blanket can be an effective tool. These blankets are usually designed with bright colors and reflective coatings to increase visibility from a distance. In daylight or high-visibility areas, a reflective space blanket can signal for help up to 10 miles away, depending on the conditions. However, consider the risk of being spotted by predators, especially in wilderness areas. In such cases, a non-reflective space blanket may be a better choice. If you do choose a reflective space blanket, use it in a way that minimizes visibility at night or in low-light areas.
Find more answers
Browse the full Q&A library by topic, or jump back to the topic this question belongs to.