The Vollint Premier are premium pressurized tennis balls providing a perfect blend of performance and durability. The balls are filled with pressurized air to reduce the weight for greater speed and spin and deliver a consistent bounce. With a high-visibility, bright yellow extra-duty felt, the balls last longer and ensure better resilience, whilst the UK woven wool cloth guarantees optimum playability on all court surfaces. These XD balls with a durable natural rubber core are perfect for competitive play, match use and coaching. They are supplied in a tube of 4.