gwylan, thanks for the info - you are correct Pentex is legal and worth considering. My understanding is it is 2x stiffer than Dacron 52, but more porous (probably why it is lighter). Have you raced the Pentex and for how many seasons? Who made it?

I originally meant to gauge the interest in non-polyester fiber/polyester film sails compared to woven polyester.
Thx Seth.hunter@i-stat.com