Aluminized Rescue Blanket, 5 Per Box. (5) Aluminized rescue blankets, per box. The blanket reduces heat by thermal radiation, water evaporation and convection. This state-of-the-art emergency blanket effectively reflects back 90% of the body's heat when wrapped around a person. Perfect for standalone first aid or as a refill for a kit. Our aluminized rescue blankets reflect back 90% of body heat when wrapped around a person. This is an Emergency prepared blanket. Our aluminized rescue blankets reflect back 90% of body heat when wrapped around a person. This is an Emergency prepared blanket.