From GolfWRX: "Out on the course, the Tensei 1K Pro Blue is smooth and responsive like you would expect from any Mitsubishi shaft. Compared to the 1K Pro White the Pro Blue is a little softer and has more of an elastic feeling to it. The Blue has a smooth feeling to it that loads easily and you can really feel the shaft build up some energy as you start the downswing." Click here to read full article.