adidas Performance MLS Glider Soccer Ball synthetic Part of the MLS Soccer collection, the design is inspired by the three MLS pillars of club, country, and community Machine stitched construction and internal nylon wound carcass for maximum durability and long-lasting performance Special TPU exterior material is designed to resist abrasion and last longer Butyl bladder for best air retention to keep the ball's shape and stay inflated longer Size 1 is a mini ball; size 3 ball suggested for ages 8 and under; size 4 ball suggested for ages 8-12; size 5 ball (official size) suggested for ages 12+; check with your local league for size requirements Ball ships deflated. Inflation is required. Pump not included.