What signs indicate an emergency blanket isn't working?

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Inspecting the Blanket When inspecting an emergency blanket, check for visible tears, cuts, or punctures. Look for any signs of moisture seepage or damage to the waterproof coating. Also, ensure that the blanket’s reflective layer is still intact and undamaged. Check the blanket’s rating, it should have a minimum of 9.0 TOG (Thermal Overall Grade) for extreme cold weather. A TOG rating of 9.0 is equivalent to a temperature rating of -22°F (-30°C).
Deployment Techniques Proper deployment of an emergency blanket is crucial to its effectiveness. To deploy the blanket, start by opening the package and shaking it out to remove any creases. Then, lay the blanket flat on the ground and smooth out any wrinkles. If the blanket has a built-in bivy sack, attach it to the blanket according to the manufacturer’s instructions. When deploying the blanket, make sure to cover yourself completely, including your head and neck. A good rule of thumb is to ensure that at least 1-2 inches (2.5-5 cm) of the blanket is above your head. This will help to trap warm air and maintain body heat.
Maintenance and Storage Regular maintenance and proper storage are essential to extending the lifespan of an emergency blanket. Store the blanket in a dry, cool place, away from direct sunlight. Avoid folding or creasing the blanket, as this can damage the reflective layer and reduce its effectiveness. If the blanket becomes wet, allow it to air dry completely before storing or using it again. It’s also a good idea to inspect the blanket regularly for signs of wear and tear, and to replace it if it shows any significant damage.