The Viper Soccer Ball from Champion Sports is a great camp, recreational, or practice ball. It features a machine stitched durable 4-ply soft touch polyurethane synthetic leather cover that is suitable for indoor or outdoor play. The durable cover surrounds an air lock butyl bladder that really keeps air in. The Viper comes backed by a manufacturers one-year unconditional guarantee against all defects, so you can kick your hardest!