Rothco Olive Drab Wool Rescue Blanket - 10430. Rothco Wool Rescue Blanket is naturally fire retardant survival blanket. The emergency blanket is made of 55% wool and 45% synthetic fibers with 1700 gram quality fabric. Can be used for both indoor and outdoor use. Great for camping or emergencies situations. All Wool Blankets Are Naturally Fire Retardant.