> Generally looks like a great concept, but I'm not sure that their claims are true. I don't see why it would get 20% higher lift compared to a normal sail. If it is true, I would think it's thanks to the robust twist control. Maybe soft sails twist too much, which limits their lift coefficient.

yes I think its more like the L/D or lift / drag that is the greatest difference accounting for better efficiency, hence less area. Actually a little surprised it isnt somewhat higher; but that as they say is another story