Runners will enjoy a smooth ride with the Karhu Fluid 5 MRE running shoe. This shoe has an asymmetrical Fulcrum lever that produces the Maximum Rolling Effect into a supportive landing. Along with this, a seamless upper reduces weight and provides excellent flexibility at toe off. The Fluid is an excellent choice for an everyday running and training shoe.Upper: External heel counter for comfortable heel lock. Welding on the medial side for structured and supportive fit. An extended toe box for better fit. Integrated lacing system for a more personalized fit. Midsole: Shortened fulcrum comfortably quickly guides the foot through the gait cycle for quick turnover. A Protect Foam compound provides cushioning while Propel Foam enhances the rolling effect. Outsole: Blown rubber forefoot and compression molded rubber heel.