Take the same performance-oriented features found in the low-top Catalyst and add the protection and stability of enhanced uppers-just the combination for people who want increased support, or those seeking lasting comfort over long distances. 1.6 mm water resistant split & nubuck leather and nylon mesh fabric upper with EVA-lution triple density phylon midsole. Nylon lined with contoured EVA footbed; gusseted tongue; padded collar; TecTuff Rand and Running Last.