Emergency Mylar Thermal Blankets (Pack of 10) Sliver & Golden Double Color RW017 Rescue Blanket provides compact emergency protection in all weather condition. Made of durable insulation Myalr material. Retains/reflects 90% of body heat. Waterproof and weatherproof. Size of each open blanket: 55-63 inches(W) x 78-83 inches(L).