Ideal for neutral runners with high arches, Karhu Fast 4 running shoes are efficient and attractive trainers. Superior underfoot support coupled with comfortable forward momentum make these shoes the perfect choice for everyday training. A great fit keeps them on your feet for a better, more proficient ride.
Upper: An open air mesh vamp supported by side quarter reinforcements ensures breathability throughout the forefoot and instep while supporting the medial and lateral saddles and sufficient protection in the toe box. The tongue is anatomically mapped around the instep and features a soft touch cap for comfort and protection from the laces. Moisture wicking collar liner gives in-shoe moisture management for a drier, more comfortable experience.
Midsole: Precision engineered compression molded EVA with tuned durometer hardness provides the ultimate forward efficiency. Anatomically designed, elastic EVA forefoot inserts with an hourglass shape ensures support and cushioning during propulsion. Two-piece insole with a compression molded EVA heel cup and a full length PU top layer gives excellent cushioning, moisture management, and durability for a great step-in feel.
Outsole: Combination compression molded and blown rubber with full ground contact sole and center deflection channel provides performance traction and forefoot cushion with lightweight landing comfort.
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