So a few of you may know that oregon is a fairly wet place. The rainy season  has started. I was out this morning doing a little hurling with a all leather sling  in the morning mist it became soaked and stretched so I switched slings to a spectra model I had with me
But doing so I realized that even though I have lived here over twenty five years I have never thought about or designed a wet weather sling.
So slinging.org any ideas for waterproof sling.

Polypropylene or some other sort of plasticky material would be ideal, as they can't soak up any water.
I usually just use anything other than natural fiber, though, and leave the sling to dry afterwards.

I don't have any experience with waxing slings, but that could provide a good level of water-proofness, too.

I've made slings and dog leashes out of Polypropylene.  Not only is it water resistant but items made from it last almost forever.

Dyneema slings are 100% water proof