J/30 Class Association Forums J/30 Forum One Design Class Rules Mainsail Material - is Hood VECTRAN legal?

Since you asked,
"If anyone has experience with different mainsail materials that provide extended life, please let me know".

I'd be happy to tell you about my, now 5+ year old, Kevlar with Carbon tape main that keeps on winning but you'd rather hear about my 26 year old Dacron main that isn't worth racing after a year or two but is still usable. How about canvass, I hear that's pretty durable.