Karhu running shoes are made by a Finnish sports company and tests its shoes on the top Finnish runners. Each Karhu running shoe is built around the concept of natural momentum. This is achieved with patented Fulcrum Technology, which allows the foot to transition through its natural movements. Karhu's are naturally centered, which makes them more balanced while reducing wasteful vertical motions. Within the family of Karhu running shoes, there are four types of Karhu Fulcrum technologies: Karhu Fast, Karhu Fluid, Karhu Forward and Karhu Racer.