Designed for emergency heat retention, these blankets are disposable, ultra-insulating and reflect over 90 percent of body heat back to the user. Measuring 130 x 210cm when unfolded, they pack into a neat folded 10 x 6cm size for portability in first aid kits or vehicles. Suitable for treating hypothermia and shock, these heat-reflective blankets are made from metallic Mylar.