Urethane is a durable material used for bowling ball covers that sits between plastic and reactive resin in terms of hook. It provides a smooth and predictable curve which makes it a favorite for playing on shorter or drier oil patterns. Many traditional bowlers prefer urethane because it offers more control than the more aggressive reactive resin balls. Therefore it is a great choice for players who want a consistent reaction without the ball snapping too sharply. For example he used his urethane ball to keep the shot controllable on the dry outer edges of the lane. Urethane is a classic ball material known for its smooth and predictable hook. He used his urethane ball to keep the shot controllable on the dry outer edges of the lane.