G.I. Type O.D. Lightweight Combat Casualty Blanket, Metalized polyester reflects and retains 90% of body heat. GI Government Issued type. Unflakable olive drab coating. Directions for use included on package. Blanket. Casualty. Lightweight. Casualty blankets is usually used in cases of emergency since hypothermia is a major risk for a casualty, the blanket must be wrapped around the casualty to avoid the heat leak.