The Fusion Ortix becomes the second Karhu running shoe shaped by fit id. The updates include a seamlessly engineered mesh upper for a better fit. A narrower heel, reduced forefoot volume, and fewer overlays ensure the Fusion Ortix fits the average shape of runners’ feet. The M-lock lacing cords help to securely wrap the midfoot while the reshaped forefoot provides comfort at the toes. Featuring a three-quarter length fulcrum, the Fusion Ortix provides supportive guidance through the gait cycle. Built on a relatively lightweight, yet durable platform, the Fusion Ortix excels at providing just the right amount of comfort and stability.