Everyday speed for future flyers. What kid doesn't want to go Mach speed? Our thoughts, exactly. Delivering the same snappy ride as our adults' style, the kids' Mach 6 is light, fast, and undeniably comfy. A lively pavement pounder geared to go the distance, we've cued up a 44% recycled woven upper, cushy 50% sugarcane EVA midsole, protective toe cap, and Durabrasion rubber outsole that's thicker than our adults' version for the extra durability your kiddos need. 44% recycled woven upper. 50% sugarcane EVA midsole. Protective toe cap. Durabrasion rubber outsole. Removable sockliner.