G-Force flame retardant underwear provides an additional barrier against fire and the resulting heat. Nomex® carbonizes and becomes thicker when it is exposed to intense heat, it becomes a protective barrier between the skin and heat source. The soft knit is hypoallergenic and more comfortable on the skin that the old standby. G-Force Underwear Top features an extra durability due to the double stitching. It is highly recommended to wear the underwear to all suits, it gives an additional time to escape from fire and extra protecion.