adidas Performance Pureboost ZG C Shoe (Little Kid) 100% Textile Synthetic Imported Synthetic sole boost 's energy-returning properties keep every step charged with an endless supply of light, fast energy Breathable mesh upper; Sock-like construction for snug fit Breathable mesh upper; Sock-like construction for snug fit Molded eyestay as part of dynamic fit system that hugs your foot like a second skin Molded heel cap; EVA outsole for smooth ride