[Johan]

Well, a 1 layer suit has 1 layer and is good for about 5 seconds in a gasoline fire before you start to get bad burns under the suit
A 2 layer suit is good for up to 10 or 11 seconds, and a 3 layer suit is good for sometimes as much as 13-15 seconds.
This is not much time, so it is a good thing to practice.
First, set up a ramp out in the street that will hit just 1 front tire, so that you can barrel roll your car into your neighbor's front yard. Then, with the car upside down, practice pulling or pushing the fire suppression system(unless children played in your car in which case they pulled it a long time ago), switching off the kill switch, undoing your harness and climbing from the car. Make note of how far along you are at the 5, 10, and 15 second intervals, then decide if you want the heavy (hot in the summer) suit, or something that "breathes" a little.
sa2000 = Special Application = fireproof
m2000 = motorcycle= not fireproof
Sometimes a corner worker will throw a fire extinguisher at you, so remember to look out for that as you are getting out of the car.
Hope this helps you ...