Select Numero 10 Soccer Ball The optimal price/performance soccer ball NCAA and NFHS approved; Made with FPUS 1500 synthetic leather 1.5mm hand-sewn PU cover with zero-wing bladder for optimal bounce 2-year Warranty Ball comes deflated. A ball pump is required to inflate the ball before use. Please note: As with all premium soccer balls, the ball should be topped off with air every few days for best results.