Product Features Leather overlays Micro-perforated suede underlays Different kinds of mesh Ballistic nylon Rope laces Pull tab Reflective details Speckled midsole Men's Shoes Stylist Notes The Fusion 2.0 is a salute to the original Karhu ‘Fusion’ model from 1996 when it was the top running shoe in the collection. To bring back the ‘Fusion’ from the archives, Karhu reworked the model with its original designer and launched it as the Fusion 2.0.