AirTime in Hood River have a new lighter & stronger bladder material they are releasing - details at www.kiteforum.com/viewtopic.php?f=1&t=2348408&sid=e79da44ffef297410d112b73a9c3f2c5&start=10 .
Claims are it’s 35 - 45% lighter than standard TPU bladders. With OR bladders at 0.005” thick isntead of the more common 0.003”, the weight savings could be up around 60% of the weight of current OR bladders. Maybe in 14 & 16 m2 kites OR is now using 0.003 material, so the weight savings isn’t so dramatic.
Anyway, still worth investigating. AirTime claims they have been testing it for 1 year in all possible conditions. Will we be seeing this stuff in OR kites anytime soon ?