the mikasa mini water polo ball is great for training or promotional use. The usa-water-polo-approved game ball is made more robust with natural rubber cover and a deep buffed surface. The aquatic ball is thus equipped with a sponge cushioning, allowing for better gripping and enhanced performance. The butyl bladder promotes excellent air and shape retention for fast rebound and good elasticity. Moreover, the polo equipment uses the water surface to keep the action moving rather than slowing it down. This sports accessory can withstand long, intense training and games. The yellow design with a black label improves visibility for easy tracking of ball movements and dynamics. Have an excellent training and playing experience with the mini water polo ball by mikasa sports.