Synthetic leather and mesh upper is both durable and breathable. 3M Reflective accents for visibility in low-light conditions. Lightning Dry lining wicks moisture to keep you dry. Ortholite sockliner for odor resistance, long-term comfort, and breathability. ABZORB foam midsole for a blend of cushioning and compression set. Medial and lateral Rollbar TPU posting system minimizes rear-foot movement for motion control. NDurance rubber outsole compound for durability in high wear areas. Wt. 9.6 oz.