Year in and year out, we find ways to make this perennial favorite better and lighter. In its 18th year, the GEL-Kayano® features a new external Heel Clutching System™ and stretch mesh Biomorphic Fit® Upper for improved comfort, while the new Dynamic DuoMax® Support System and lightweight AHAR® outsole ensure a lightweight, stable ride. SICS® design philosophy that employs linked componentry to enhance the foot's natural gait from heel strike to toe-off. Vertical flex groove decouples the tooling along the line of progression for enhanced gait efficiency. Stretch material strategically placed on the upper helps to reduce buckling and the potential for irritation. Exoskeletal heel counter provides improved support and creates improved heel fitting environment. This evolution of the DuoMax® System enhances stability and support, with reduced weight and increased platform comfort.