RS-X is back! With their clean lines and bold monochrome design, these sneakers are what we like to call ‘future retro’. And they offer substance as well as style: like all shoes with our RS (‘Running System’) tech, they ensure excellent shock absorption and control in every stride. Mesh upper Synthetic overlays PU midsole Rubber outsole *** Formstrip on the medial and lateral sides *** Youth: Recommended for youth between 8 and 16 years 49% Synthetic, 7% Rubber, 44% Textile for men and women.