CHINOOK - POWER GLIDE RIG: Light weight, Durable, Easy & Fun! This sail is designed for demanding recreational sailors. Performance, durability, and light-weight built into one sail. Majority of X-ply material combined with Dacron is very light yet extremely durable. Endo-batten seam shaping helps to create a powerful sail that is tunable with screw-adjusting batten tensioners. SIZE OPTIONS: 3.0, 3.5 (target Youth and small adults), 4.0, 4.7, 5.5, (4 battens) 6.5, 7.5 ( 5 battens) Key Sail Features: No monofilm, 100% spectra X-ply for superb durability. Dacron Luff panel for a soft, forgiving feel. Vinyl window stays clear for the life of the sail. Mast pad protects your feet and your board. US made RBS battens are virtually unbreakable. 4 battens in all sizes (except 6.5-7.5 m2: 5 battens) provide superb stability and durability, sail bag.