adidas Performance J Wall 2 Boost J Shoe (Big Kid) 100% Textile/Synthetic Imported Rubber sole Shaft measures approximately Mid-Top" from arch boost 's energy-returning properties keep every step charged with an endless supply of light, fast energy Breathable and flexible adidas Primeknit upper for an enhanced fit ADIPRENE+ in the forefoot maintains propulsion and efficiency J Wall details on heel cap with heel pull tab Non-marking rubber outsole