The Chinook Sailing Power Glide Rig with Carbon 70% RDM mast upgradeoffersperformance and durability in a lightweight package complete with sail. Constructed mostly of X-ply material and combined with Dacron, the sail is very light yet extremely durable. Endo-batten seam shaping battens helps to create a powerful sail that is tunable with screw-adjusting batten tensioners. This upgrade package includes an Ezzy built sail, 2-piece Carbon 70% Reduced Diameter Mast, Sport Boom, 1-Bolt Tendon Mast Base, Skinny Alloy Extension, and Uphaul. Designed for demanding recreational sailors looking for that extra edge of performance and feel.