Originally Posted By Rick_D
IIUC it's also the case that poly stretches when wet moreso than nylon, so sil-nylon and PU nylon are generally the better choices. What I don't recall is which is more stable with time and which resists UV exposure better. I've had shelter fabric shred or lose its coating with time.

Cheers,
I think it's the other way around. Poly does not stretch when wet like nylon. I'll have to look for info. about which coating is more UV stable. I think I remember, I just don't want to say without confirming what I think I know.
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