POWEREX composite masts are designed, manufactured and distributed by MacLean Quality Composites Inc., one of the USA's leading producers of high quality composite parts. Powerex offers a 100% American-made product, unsurpassed in quality, performance and value. Each Powerex mast curve is designed according to leading sail designer specifications. These are used to create a composite laminate design that is further refined by laboratory and on-the-water testing to achieve optimum mast-to-sail compatibility.