1. Fire retardant Nomex® thread used throughout pant construction, as well as self-fabric pocket bags for protection from fire and heat 2. 2-inch, structured waistband with fire retardant Tru-grip? silicone to keep shirt tucked at all times 3. Military-style permanent, Supercrease®, that lasts the life of the garment 4. Double-needle stitched gusseted crotch for wider range of motion and comfort 5.