Looks like Severne introduces new materials into the S1 range, with radiating carbon fiber tape technology, similar to Neil Pryde Forceline or Avanti Sails construction, I imagine it will be lighter weight.
Saw this pic on facebook from Pozo pre competition sailing.
Looks fabulous! Cant wait to try this technology, Using 2013 and 2014 S1s the sails are excellent! Truly singular in feel.
Ben Severne for president! Or Prime Minister!
Pic from Jose Pina, World of Windsurf