By the Numbers: If You Carry a Space Blanket, Buyer Beware - Backpacking Light
Emergency Thermal Blanket Outdoor Waterproof Survival - Temu
Amazon.com: Emergency Silver Mylar Thermal Compact Waterproof Blankets for First Aid Kits, Natural Disasters Equipment, Retain Body Heat, Keeps You Warm (Pack of 10) : Sports & Outdoors
emergencies - Which side of an emergency blanket should I use? - The Great Outdoors Stack Exchange