Titan Two-Sided Mylar Emergency Survival Space Blankets, 5-Pack | Designed for NASA's Apollo Program and Heat Retention | Perfect for Marathons, Emergency Kits, and Go-Bags. Free eBooks Included. Mylar Made in USA or Imported DESIGNED FOR NASA - Originally designed for space exploration, our durable advanced aluminized Mylar blankets are reusable, waterproof and windproof and can also be used for both ground cover, rescue or distress beacons, ponchos, tarps, and shade. EMERGENCY USE  Perfect for emergency situations where warmth or protection from inclement weather conditions is required. Helps prevent hypothermia and shock by retaining up to 90% of a user's body heat. COMPACT DESIGN - Each 52" x 82" survival blanket is individually folded, wrapped, and sealed for easy storage and retrieval. These blankets are perfect for Marathons, Backpacking, Emergency Kits, and Go-Bag or Bug-Out Bag gear. ALWAYS INNOVATING - TITAN is dedicated to providing you with innovative, high-quality, outdoor survival gear and tactical products. From planned Camping, Hiking, and Boating trips, to unplanned Emergency situations - Our focus on Superior Quality means Superior Performance that you can count on. THE TITAN PROMISE - We're an American Veteran-Owned business, and all authentic TITAN products have a LIFETIME GUARANTEE. If you're unhappy with our products in any way, we will completely refund your purchase. No questions asked.