Emergency Mylar Thermal Blankets Silver Survival Reflective Rescue Sleeping Bag / Sheet &ndash; Portable Body Cover That Generates Warm Heat From Insulation &ndash; Great for Hikers / Hiking / Camping / Snowboarding / Snowboarders &ndash; 100% Lifetime Guaranteed (2 Pack) 54 inches x 84 inches (When Completed Opened) Retains/reflects 90% of Body Heat Weatherproof and Waterproof Portable Blanket Protect Cold and Rainy Weather Conditions