Tennis balls are covered with a special type of material designed to increase their durability and performance on the court. The outer layer of a tennis ball is usually made from felt fabric or a similar material, providing a consistent bounce and spin for players. This material is also resistant to moisture, so the ball won't become heavy and waterlogged when it gets wet. The inner core of the ball is typically made from rubber or foam, giving the ball its shape and providing a softer hit. This combination of materials allows tennis balls to withstand the rigors of the game and provide a consistent performance every time.
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