These NB 880's have been re-tooled for the trails. The synthetic, water-resistant upper is coupled with quick-drying mesh to keep you comfortable. The outsole has been equipped with sticky rubber to ensure traction and saftey. Perhaps most importantly, these sneakers are built to last. Ndurance rubber compound has been placed in the highest wear areas, which allows the tread to hold up for longer than standard sneakers. Using the comfy ACTEVA Lite midsole, these runners are a great choice for the trails ahead.