Thin Air Silent Soccerball 8"Silent Indoor Training: Practice without the noise with our airless foam soccer ball, perfect for indoor dribbling and kicking drills. Made of high density soft foam. Realistic Bounce: Enjoy an authentic playing experience with a realistic bounce, mimicking the feel of a traditional soccer ball. Mini Indoor Size 8: Fun size 8 inch soccer ball, ideal for all standard training exercises and skill levels. Improve your soccer skills indoors our outside.