The Blade Pro is the ultimate in advanced windsurf sail building technology. The Blade and S-1 Pro models from Severne are the lightest sails available on the market today. They are also extremely durable! Unique membrane technology lets the sail "breathe" like no other. The fibers that are run throughout the load paths of the sails not only give the sails great impact resistance but also keep the sail in it's optimal shape thought the entire wind range. There is no going back to a conventional sail after tasting a Blade or S-1 Pro.