Synthetic upper Rubber midsole Rubber outsole PUMA Formstrip on the medial and lateral sides PUMA Youth: Recommended for youth between 8 and 16 years Puma Smash Future U Takes Our Puma Smash Line To The Next Level. These Sneakers Pair A Classic Silhouette With A Futuristic Colour Scheme For A Fashion Forward Edge. Their Cushioned Lining Makes Them Comfortable Enough To Wear All Day.