Space Blanket

A space blanket is an ultra-lightweight emergency shelter made from thin, reflective metallic material (typically aluminized polyester or mylar). It reflects up to 90% of body heat back to the user, making it essential for preventing hypothermia in emergency situations during hiking and backpacking. Space blankets are commonly included in first aid kits and survival gear due to their compact size, weighing only 1-2 ounces while providing critical warmth retention when regular shelter or sleeping systems fail.