The Dunlop Aerogel 500 Tour 4D combines AeroGel and 4D Braided technologies in a heavier-heft 'tweener racquet option in Dunlop's 2009 line. 4D Braided technology has been added at strategic locations on the frame hoop, improving stability and greatly enhancing touch and feel. Geared to the intermediate to advanced player, the Dunlop Aerogel 5 Hundred Tour 4D weighs about an ounce more than the standard Aerogel 500 4D, with a more head light balance and higher swingweight. Ideal for a moderate to fast swing, the AeroGel 500 Tour 4D also works well for the player looking for great spin potential and a little more pop on their shots.