Wool blankets are naturally flame retardant.
Because of the natural moisture and oils in wool fiber, a wool blanket will not support a flame or continue to burn. The natural moisture causes the flame to "self extiquish" and turn into ash.
Author: Paulette Butler
For this reason, wool blankets would be an asset in every home. I had a firefighter tell me that he wished every child had a wool blanket in their bed. In the event of a fire, the child could be wrapped up in the blanket and removed from the house with greater safety.
Wool bed blankets are used in homeless shelters, refugee camps, dormitories and institutions for their safety properties.
Flame retardant wool blankets are used in school buses, chemistry labs and fire extiquisher cabinets to put out fires.
Northwest Woolen Mills