I make kites as well as fly them and was wondering why no one has ever made a SUL kite out of something like PC-31/icarex. since it only weighs .5 oz for sqyd it seems like that would be the ideal material for light wind. the lightest material I have seen so far it the material used for the HQ Matrix II

I'm thinking durability (tabs popping in extreme use) and porosity (over time with exposure to sun / cold, etc.) may be a reason. if someone did release a SUL sail (say FS) you can bet they would charge an arm and a leg (ref: Speed, Ozone Chrono, etc.). That's just my $0.02 (and I got into the kiting world back in 1993 with SULs and dual line flying)

What Brian said.... Ozone and Flysurfer already make kites that are available in standard vs UL skins (FS Deluxe models and kites like the Summit which can be purchased with a premium canopy material).

I expect the stresses that a dual SUL faces are considerably less that what a typical foil would have to endure.

Also factor in several hundred dollars replacement cost for a dual line vs a foil that would cost another order of magnitude.

ATB,
Sam