Ezzy skinny masts contain 90% pre-preg carbon fiber. Pre-preg is the key to achieving a superior weight-to-strength ratio.The fibers are pre-saturated to an exact resin-to-fiber ratio, then hand-wrapped around a mandrel, and then thermally cured. These masts are all available as halves - let us know if that is what you are looking for! The Ezzy Skinny Mast gets its superior strength from the 50% extra thickness of its walls.The small diameter makes the Ezzy Skinny a dream to sail. You'll notice the improved handling right away in your jibes.Ezzy Masts can be bought complete or as tops and bottoms which are interchangeable and sold individually. You can buy the perfect combination for your sail quiver. This means fewer masts. The general rule when mixing tops and bottoms is: choose a shorter bottom with a longer top.The Ezzy Sails are widely tested on standard and reduced diameter masts, and work perfectly well, but if you are looking for the perfect blend of performance and durability for Wave, Bump and Jump or even Slalom conditions, the RDM mast system is is the way to go.