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Lamont Cranston
 
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On 04 Jan 2005 03:04:25 GMT, (Greg) wrote:

The new PFDs with the dense cell foam will probably float forever. I have found
old type 4s stuck in the mangroves that may have been there for years and they
still float fine, the cover and straps will fail long before the foam
waterlogs.
I think the whole idea of "floatation hours" dates from the days when these
things were stuffed with Kapok.


I did a little more digging and it would appear that the only
"requirement" is the original testing by the manufacturer. And that's
a 24 hour test.

It would appear that the only limitation is the failure of the jacket
itself.