Emergency Silver Mylar Thermal Compact Waterproof Blankets for First Aid Kits, Natural Disasters Equipment, Retain Body Heat, Keeps You Warm (Pack of 10) For emergency situations where warmth or protection from weather conditions is required. Helps prevent hypothermia and shock by retaining body temperature with quality weather resistant material. First aid kit blankets block and repel rain, snow, and moisture to keep you dry in damp, wet, cold, rainy environments. Helps maintain approximately 90% of body heat during intense cold climates. The size and measurements of each blanket when opened and unfolded are: 54&#034; inches x 84&#034; inches or 4 1/2&#039; by 7&#039; Feet. Each order comes in a package of 10 emergency thermal blankets.