SPEED 600 2 contains many technical running properties and weighs only 295 grams. Premium mesh upper that breathes, is comfortable and provides support. Individual lacing and details in reflective material that allows you to sew in the dark. Heel cap in TPU that provides extra support. Midsole in two layers, HYBRID and PROFOAM which provides immediate cushioning. PROPLATE in the outsole which is made of nylon drives the runner forward to generate more speed. Rubber outsole for good grip and stability.