......not totally useless. They will find the body faster.

You can bob like a buoy. :eureka:

Maybe it means that no matter what type of flotation device you have on it will not be enough to save your life at the speed these boats race????

I think they are trying to say nothing else compares to Lift line at 100mph. All other makes don't qualify. Bad choice of words.

Read it like this;

"No jacket qualifies , as a life line jacket , at 100mhp!"

Thats what I meant...Its just hype.