GLORY SPORTS Official Size PU Match and Competition Thermo Bonding Soccer Ball NO PUMP: Because of the thermo bonding soccer ball, The soccer ball doesn't need pump, it is inflated before shipping. Material: 1.0mm PU(PRISMA), 4.0mm EVA, wrapped rubber bladder, the size 5 soccer ball diameter: 21.8cm. Thermo bonding soccer ball, 32 panel construction with unique and striking design, optimal for match and training play. Size 3 ball suggested for ages 7 and under, Size 4 ball suggested for ages 7-12, Size 5 ball (official size) suggested for ages 12 and above. PU cover for superior durability, valve and wrapped rubber bladder for best air retention to keep the ball's shape and stay inflated longer.