Neutral. Boasting a clean, low profile minimalistic design, the Karhu Flow 3 Trainer provides lightweight efficiency and a highly responsive forward ride for the performance and competitive neutral runner. Lighter than its predecessor, the Flow 3 Trainer would be a great choice for reaching your next PR.

Upper: Anatomically sculpted air mesh and minimal low-profile side vamps ensure breathability throughout the forefoot and instep while forming supportive medial and lateral side saddles. The tongue is anatomically mapped around the instep and features a soft touch logo that provides comfort and protection from the laces while not interfering with fit. HF welded eyelets, a precision welded toe tip and mountain M with reflective Bear logo provides lightweight support in the quarter panel with added reflectivity and durability. Reflective heel logo provides increased visibility in low light conditions. Dual-pronged memory foam heel collar provides an ergonomic fit with heel lock. Moisture wicking fabric in the lining provides in-shoe moisture management.

Midsole: EVA padded lasting board provides step in comfort. Precision engineered compression molded EVA midsole with tuned durometers provides ultimate forward efficiency. A directly placed 70 durometer EVA fulcrum propels runners’ transition onto their forefoot and into toe-off efficiently, reducing breakdown forces and heel drop in the landing phase. Compression molded EVA insole provides increased arch support, moisture management with a great step-in feel.

Outsole: Wearable EVA outsole with expanded areas of compression molded rubber in key abrasion areas and a center deflection channel provides ultra-lightweight performance traction with great durability and landing comfort.

The March 2013 edition of Competitor magazine names these shoes a Modern Classic. “It’s versatile for several types of running, from long slow distances and tempo runs, to speed workouts and racing from distances 5K to the marathon.”