New Balance Fresh Foam X Hierro V8 Trainers - Castlerock / Shadow GreyTaking it to the trails, the Hierro V8 is developed to handle the rigours of off road running, alongside a high traction Vibram outsole to provide grip on difficult terrain. Weighing in at a hyper light 293 grams, with New Balances engineered Fresh Foam X midsole and newly increased stack height providing a highly cushioned ride over the most punishing of trails. Finally, the breathable synthetic mesh upper locks the foot in place. Synthetic + mesh