I need to buy a driving suit and have an SFI requirement in my rulebook. According to the rulebook, I need SFI3.2A/x or greater. I have looked atr suits that state SFI 1 and SFI 5. I have no idea which is a higher spec and which is a lower spec... I went to the SFI website and it is useless for this sort of information.

Anyone know where I can gain access to this information?

Maybe I'm just being stupid. I assume that the SFI 1 and the SFI 5 described on the products are the "x" in SFI 3.2A/x?

Did a quick google search and came up with this article. Click here.

You are correct assuming the X corresponds to the "1" or the "5" and that is an indicator of time to a second degree burn. The "1" being good for 3 seconds anf the "5" being good for 10 seconds.

Good link Jeff. Keith, try http://www.racerwholesale.com for some good suits. They have 3.2A5 suits with TPP of approx. 30 for very good prices I think. I was going to buy my suit there last year until I found a local guy selling his for a big discount, that he had bought too small and never used.

I didn't wear any underwear with my suit last year but I will this year. Have to look into some kind of cool suit for the summer races too.

No undies,

Alright, perhaps I should clarify my previous post. No fire-resistant underwear.