Cosco Tretorn Serie Tennis Ball

• Cosco Tretorn Serie Pressurised Balls Packed in a Petcan of 3 Balls.

• The Tretorn Serie Tennis Balls feature extra durability on all court surfaces provided by a special mix of wool, cotton and synthetic fibres.

• Serie balls are the first tennis balls in the world with a unique TRI-TEC sealing membrane, which is used to retain air and keep balls pressure significantly longer than any conventional pressurised ball.

• Official Ball of ATP World Tour and ATP Challenger Tour.