The improvements incorporated into the 2009 model are designed to deliver better distance and includes a new cover that much improves durability. Once again Titleist’s famous 392 dimple design is used to great affect to promote a much cleaner, more consistent ball flight. The Pro V1’s new Urethane Elastomer cover not only improves durability but also works with the ball’s larger and redesigned core and the extra thin Ionomeric casing layer to provide a ball that provides the kind of drop and stop performance that all golfers, from the Tour professional to the aspiring club golfer, demand from a ball.