Simple and modern, the ZX Flux is a descendant of the iconic ZX 8000 running shoe. These men's shoes have a one-piece mesh upper with welded TPU 3-Stripes. Breathable mesh upper. Welded TPU 3-Stripes. TORSION? SYSTEM for midfoot integrity. Injected EVA midsole for long-term, lightweight cushioning. Supportive heel cage. Rubber outsole. Imported.