Our durable advanced aluminized Mylar blankets are perfect for outdoors emergency kits.Each survival blanket is individually folded, wrapped, and sealed. They are reusable, waterproof and windproof and can also be used for both ground cover and shade.Perfect for emergency situations where warmth or protection from all-weather conditions is required. Helps prevent hypothermia and shock by retaining up to 90% of a user's body heat.