A standard fire suit provides 8 to 10 seconds of defense against second-degree burns. That's not much time when you consider the things that need unbuckled, disconnected, unsnapped and removed in order for you to get out of the car with the stress involved from the unthinkable. Nomex underwear gives you an extra layer of protection and additional time to get out. Fire-retardant Nomex fabric adds precious seconds of thermal protection against burns in the event the unthinkable happens.Not SFI Approved.Features