Inherently Flame Retardant. A property of fabric (softgoods) regarding its inability to sustain a flame. Advantages are that the fabric never needs to be re-treated. Disadvantages include more expensive, man-made fiber, and possibly a more reflective finish.
For more, see Rosebrand's Flame Retardant Fabrics: What's the Difference Between FR, IFR, DFR, and NFR Fabrics?.
For more, see Rosebrand's Flame Retardant Fabrics: What's the Difference Between FR, IFR, DFR, and NFR Fabrics?.