Saucony - Grid Fastswitch-Speed (Silver/Yellow) - Men's: Whether it's a 5 K race or a marathon, runners can select the correct racing shoe built specifically towards race distance and their bio-mechanical needs. Geared for efficient runners who perform shorter, faster-paced runs. A low-profile outsole of thin carbon rubber provides maximized energy transfer with minimal weight. Midfoot Support Bridge uses a rigid material in the shank area of the midsole keeps the foot neutral in the midfoot phase of the gait cycle. Compression molded EVA midsole, a diverse midsole material which is durable, lightweight, and provides responsive cushioning. XT-600 outsole, a carbon rubber outsole material which offers outstanding abrasion and traction properties. Strobel lasted using a performance last. Shoe weighs 7.6 oz.