Outer material is soft-touch TPU with EVA foam backing. This ensures the durability and softness of the ball. The Dali II training ball is constructed with classic hand-stitched technology to provide high quality stitching and a strong bond. 4 ply poly-cotton lining increases the strength, power and control, with 32 panel construction for optimum aerodynamic control. This ball retains its shape and weight in all weather conditions.