Designed for trail running, the New Balance Fresh Foam X Hierro v7 shoes are built with a lightweight Fresh Foam midsole to help cushion your stride over uneven terrain. The durable, proven Vibram MegaGrip outsole will give you excellent grip at a light weight. This outsole features 4.5 mm lugs to maximise traction on climbs and descents. The mesh and synthetic upper combines ventilation and protection on the top of the feet.