PIP is pleased to announce additions to its FR Work Apparel clothing line. What is Flame Resistant apparel? Flame resistant apparel meets specific ASTM standards that deem the fabric flame resistant for wearing apparel. Flame resistant fabrics and garments provide protection against clothing ignition, sustained flame spread and do not melt or drip. The material resists ignition, self-extinguishes and the FR properties last for the wearable life of the garment.