2 questions for you:
Where are you going?
What was wrong with the polycryo or window film? It is lighter than cuben, no?
Ok, that was 3 questions.
Well what I have found, and it could be wrong, is polycro is basically the same stuff that is used for the laminate in cuben fiber - so like cuben fiber without the weave. My concern was it would wear out too quickly.
I'm tapatalkin' ya'll
Would the polyester ripstop like at kitebuilders.com work for you?
May your trails be crooked, winding, lonesome, dangerous, leading to the most amazing view. May your mountains rise into and above the clouds. - Ed Abbey