The adidas Performance children hyperfast sports shoes are characterized by synthetic inserts for resistance in the main areas of. They also feature a moisture-wicking, anti-microbial OrthoLite Sohle.- EVA midsole for lightweight cushioning The breathable mesh fabric in the upper adjustable Velcro straps for proper fit and comfort (two Velcro strips to Gr. 31 ., from size 32 three Velcro fastener) removable adiFIT insole for exact size measurement Hyper-flexible outsole upper: textile, other materials lining and insole: textile sole: other materials