NoLimitz Windsurfing Masts are as good as it gets!  Super Strong, Super Light, Super High Quality!  Made in the USA to impeccably high standards.  Great prices with worldwide shipping available!  The Original and the Sumo are both 91% carbon- the difference lies in the stiffness.  Choose the Sumo for a stiffer feel, and the Original for a slightly softer feel.  It is also possible to mix and match tops and bottoms to fine tune bend curves for your particular sails.