So after enough washes to keep almost anyone going for the lifetime of the garment, it drops from far, far more HH than you actually need to merely far more. That's not actually too off-putting IMHO...
Hilleberg tents start life with a 3000mm hydrostatic head. They're not known for leaking...
If you're in a real gale-powered deluge you'll get plenty wet anyway because walking jackets don't have formal seals on cuffs, hem and neck.
There was that discussion on this on the bpl.com forums - here.
It seems that tents can get away with quite a bit less because they deform slightly when a big rainddrop hits them while clothing (on shoulders at least!) can't. Makes sense I think.
I don't know if wind driven rain drops have a truly higher energy than non wind driven ones - they've fallen a long way after all! - but it does seem like you mostly really need big HH's for really violent thunderstorms, which I don't think we really get here?
So 5k could be plenty, monsoon's perhaps....
Powershield different Powershield pro same tech and was claimed as 5k initial down to ~3k regular so yes.
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What I'll try to do ideally is to get a sample jacket placed with a heavy user
So if I eat enough pies you'll send one to me?
Polyurethane can degrade by hydrolysis in the presence of water. This is the cause of tent coatings becoming sticky if left wet for too long (besides mildew...); see 'how should I store my tent' on this MSR FAQ.
I'm guessing that this cunning electrospun PU forms a matrix of very, very fine PU filaments. I might be tempted to suggest that these very fine filaments may hydrolyse in the washing process, and thus cause the matrix to open up, thus reducing the HH.
It's just a theory...
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