RaceQuip fire retardant under-layers give one more layer of protection in the event of a racecar fire. When seconds can make the difference between life and death, there should be no question of it being worth the investment. The Fire Retardant(FRC) cotton fabric performs similar to Nomex, but is more cost effective. The FRC is a soft knit blend of Aramid and cotton is excellent for wicking moisture from your skin, along with being light weight and hypoallergenic.